This file is indexed.

/usr/share/gromacs/top/oplsaa.ff/aminoacids.rtp is in gromacs-data 2018.1-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
; New format introduced in Gromacs 3.1.4.
; Dont use this forcefield with earlier versions.

; This residue database includes new reparameterized sidechain dihedrals 
; from Kaminski et al (JPCB, 2001) that override the default atomtype-based 
; dihedrals. We use set 2 for SER and THR, set 2 for ASP, and the better 
; separate dihedrals for LEU and VAL instead of the combined ones, since we
; can specify them here without using introducing extra atom types.
; (That was the reason they were combined in the paper).

; NB: OPLS chargegroups are not strictly neutral, since we mainly
; use them to optimize the neighborsearching. For accurate simulations
; you should use PME.

[ bondedtypes ]
; Column 1 : default bondtype
; Column 2 : default angletype
; Column 3 : default proper dihedraltype
; Column 4 : default improper dihedraltype
; Column 5 : This controls the generation of dihedrals from the bonding.
;            All possible dihedrals are generated automatically. A value of
;            1 here means that all these are retained. A value of
;            0 here requires generated dihedrals be removed if
;              * there are any dihedrals on the same central atoms
;                specified in the residue topology, or
;              * there are other identical generated dihedrals
;                sharing the same central atoms, or
;              * there are other generated dihedrals sharing the
;                same central bond that have fewer hydrogen atoms
; Column 6 : number of neighbors to exclude from non-bonded interactions
; Column 7 : 1 = generate 1,4 interactions between pairs of hydrogen atoms
;            0 = do not generate such
; Column 8 : 1 = remove proper dihedrals if found centered on the same
;                bond as an improper dihedral
;            0 = do not generate such
; bonds  angles  dihedrals  impropers all_dihedrals nrexcl HH14 RemoveDih
     1       1          3          1        1         3      1     0

[ ACE ]
 [ atoms ]
   CH3    opls_135   -0.180     1
  HH31    opls_140    0.060     1
  HH32    opls_140    0.060     1
  HH33    opls_140    0.060     1
     C    opls_235    0.500     2
     O    opls_236   -0.500     2
 [ bonds ]
   CH3  HH31
   CH3  HH32
   CH3  HH33
   CH3     C
     C     O
[ impropers ]
  CH3    +N    C      O     improper_O_C_X_Y 

[ ALA ]
 [ atoms ] 
     N    opls_238   -0.500     1
     H    opls_241    0.300     1 
    CA    opls_224B   0.140     1 
    HA    opls_140    0.060     1 
    CB    opls_135   -0.180     2 
   HB1    opls_140    0.060     2 
   HB2    opls_140    0.060     2 
   HB3    opls_140    0.060     2 
     C    opls_235    0.500     3
     O    opls_236   -0.500     3
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB   HB3
     C     O
    -C     N
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 


[ AIB ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1 
    CA    opls_225B   0.200     1 
   CB1    opls_135   -0.180     2 
  HB11    opls_140    0.060     2 
  HB12    opls_140    0.060     2 
  HB13    opls_140    0.060     2 
   CB2    opls_135   -0.180     3 
  HB21    opls_140    0.060     3 
  HB22    opls_140    0.060     3 
  HB23    opls_140    0.060     3 
     C    opls_235    0.500     4
     O    opls_236   -0.500     4
 [ bonds ]
     N     H
     N    CA
    CA   CB1
    CA   CB2
    CA     C
   CB1  HB11
   CB1  HB12
   CB1  HB13
   CB2  HB21
   CB2  HB22
   CB2  HB23
     C     O
    -C     N
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y
    CA    +N     C     O    improper_O_C_X_Y


[ ARG ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_136   -0.120     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_308   -0.050     3
   HG1    opls_140    0.060     3
   HG2    opls_140    0.060     3
    CD    opls_307    0.190     4
   HD1    opls_140    0.060     4
   HD2    opls_140    0.060     4
    NE    opls_303   -0.700     5
    HE    opls_304    0.440     5
    CZ    opls_302    0.640     5
   NH1    opls_300   -0.800     6
  HH11    opls_301    0.460     6
  HH12    opls_301    0.460     6
   NH2    opls_300   -0.800     7
  HH21    opls_301    0.460     7
  HH22    opls_301    0.460     7
     C    opls_235    0.500     8
     O    opls_236   -0.500     8
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   HG1
    CG   HG2
    CG    CD
    CD   HD1
    CD   HD2
    CD    NE
    NE    HE
    NE    CZ
    CZ   NH1
    CZ   NH2
   NH1  HH11
   NH1  HH12
   NH2  HH21
   NH2  HH22
     C     O
    -C     N
 [ dihedrals ] ; override some with residue-specific ones
     N    CA    CB    CG    dih_ARG_chi1_N_C_C_C
    CG    CB    CA     C    dih_ARG_chi1_C_C_C_CO
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 
    CD    CZ    NE    HE    improper_Z_N_X_Y 
    NE   NH1    CZ   NH2    improper_O_C_X_Y  
    CZ  HH11   NH1  HH12    improper_Z_N_X_Y  
    CZ  HH21   NH2  HH22    improper_Z_N_X_Y  

[ ARGN ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_136   -0.120     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_308   -0.050     3
   HG1    opls_140    0.060     3
   HG2    opls_140    0.060     3
    CD    opls_748    0.040     4
   HD1    opls_140    0.060     4
   HD2    opls_140    0.060     4
    NE    opls_749   -0.620     5
    HE    opls_304    0.350     5; guessed charge
    CZ    opls_752    0.550     6
   NH1    opls_750   -0.785     6
   HH1    opls_301    0.340     6; guessed charge
   NH2    opls_751   -0.785     7
  HH21    opls_301    0.360     7; guessed charge
  HH22    opls_301    0.360     7; guessed charge
     C    opls_235    0.500     8
     O    opls_236   -0.500     8
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   HG1
    CG   HG2
    CG    CD
    CD   HD1
    CD   HD2
    CD    NE
    NE    HE
    NE    CZ
    CZ   NH1
    CZ   NH2
   NH1   HH1
   NH2  HH21
   NH2  HH22
     C     O
    -C     N
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 
    CD    CZ    NE    HE    improper_Z_N_X_Y 
    NE   NH1    CZ   NH2    improper_O_C_X_Y 
    CZ  HH21   NH2  HH22    improper_Z_N_X_Y 


[ ASN ]
 [ atoms ]
     N    opls_238   -0.500     0
     H    opls_241    0.300     0
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_136   -0.120     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_235    0.500     3
   OD1    opls_236   -0.500     3
   ND2    opls_237   -0.760     4
  HD21    opls_240    0.380     4
  HD22    opls_240    0.380     4
     C    opls_235    0.500     5
     O    opls_236   -0.500     5
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   OD1
    CG   ND2
   ND2  HD21
   ND2  HD22
     C     O
    -C     N
 [ dihedrals ] ; override some with residue-specific ones
     N    CA    CB    CG     dih_ASN_chi1_N_C_C_C
    CG    CB    CA     C     dih_ASN_chi1_C_C_C_CO
    CA    CB    CG   ND2     dih_ASN_chi2_C_C_CO_N
 [ impropers ]
    -C    CA     N     H     improper_Z_N_X_Y 
    CA    +N     C     O     improper_O_C_X_Y 
    CB   ND2    CG   OD1     improper_O_C_X_Y   
    CG  HD21   ND2  HD22     improper_Z_N_X_Y   

[ ASP ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_274   -0.220     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_271    0.700     3
   OD1    opls_272   -0.800     3
   OD2    opls_272   -0.800     3
     C    opls_235    0.500     4
     O    opls_236   -0.500     4
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   OD1
    CG   OD2
     C     O
    -C     N
 [ dihedrals ] ; override some with residue-specific ones
     N    CA    CB    CG    dih_ASP_chi1_N_C_C_C
    CG    CB    CA     C    dih_ASP_chi1_C_C_C_CO
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y
    CA    +N     C     O    improper_O_C_X_Y
    CB   OD1    CG   OD2    improper_O_C_X_Y

[ ASPH ]
 [ atoms ]
     N    opls_238   -0.500     0
     H    opls_241    0.300     0
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_136   -0.120     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_267    0.520     3
   OD1    opls_269   -0.440     3
   OD2    opls_268   -0.530     4
   HD2    opls_270    0.450     4
     C    opls_235    0.500     5
     O    opls_236   -0.500     5
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   OD1
    CG   OD2
   OD2   HD2
     C     O
    -C     N
 [ dihedrals ] ; override some with residue-specific ones
     N    CA    CB    CG    dih_ASP_chi1_N_C_C_C
    CG    CB    CA     C    dih_ASP_chi1_C_C_C_CO
    CB    CG   OD2   HD2    dih_sidechain_COOH_C_C_O_H
   OD1    CG   OD2   HD2    dih_sidechain_COOH_O_C_O_H
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 
    CB   OD1    CG   OD2    improper_O_C_X_Y     


[ CYS2 ] ; aka CYX
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_214    0.0975    2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    SG    opls_203   -0.2175    2
     C    opls_235    0.500     3
     O    opls_236   -0.500     3
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    SG
     C     O
    -C     N
 [ dihedrals ] ; override some of the typebased dihedrals
     N    CA    CB    SG    dih_CYS_chi1_N_C_C_S
     C    CA    CB    SG    dih_CYS_chi1_CO_C_C_S
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 

[ CYSH ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_206    0.060     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    SG    opls_200   -0.335     3
    HG    opls_204    0.155     3
     C    opls_235    0.500     4
     O    opls_236   -0.500     4
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    SG
    SG    HG
     C     O
    -C     N
 [ dihedrals ] ; override some of the typebased dihedrals
     N    CA    CB    SG    dih_CYS_chi1_N_C_C_S
     C    CA    CB    SG    dih_CYS_chi1_CO_C_C_S
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 

[ GLN ]
 [ atoms ]
     N    opls_238   -0.500     0
     H    opls_241    0.300     0
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_136   -0.120     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_136   -0.120     3
   HG1    opls_140    0.060     3
   HG2    opls_140    0.060     3
    CD    opls_235    0.500     4
   OE1    opls_236   -0.500     4
   NE2    opls_237   -0.760     5
  HE21    opls_240    0.380     5
  HE22    opls_240    0.380     5
     C    opls_235    0.500     6
     O    opls_236   -0.500     6
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   HG1
    CG   HG2
    CG    CD
    CD   OE1
    CD   NE2
   NE2  HE21
   NE2  HE22
     C     O
    -C     N
 [ dihedrals ] ; override some of the typebased dihedrals
     N    CA    CB    CG    dih_GLN_chi1_N_C_C_C
    CG    CB    CA     C    dih_GLN_chi1_C_C_C_CO
    CB    CG    CD   NE2    dih_GLN_chi3_C_C_CO_N
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 
    CG   NE2    CD   OE1    improper_O_C_X_Y  
    CD  HE21   NE2  HE22    improper_Z_N_X_Y        

; Charged Glutamine
; See. Patriksson et al. Int. J. Mass. Spectrom. 248 pp 124-135 (2006)
[ QLN ]
 [ atoms ]
     N    opls_238   -0.500     0
     H    opls_241    0.300     0
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_136   -0.120     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_136    0.054     3
   HG1    opls_140    0.131     3
   HG2    opls_140    0.131     3
    CD    opls_235    0.544     4
   OE1    opls_154   -0.496     4
   HE1    opls_155    0.498     4
   NE2    opls_237   -0.720     5
  HE21    opls_240    0.429     5
  HE22    opls_240    0.429     5
     C    opls_235    0.500     6
     O    opls_236   -0.500     6
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   HG1
    CG   HG2
    CG    CD
    CD   OE1
   OE1   HE1
    CD   NE2
   NE2  HE21
   NE2  HE22
     C     O
    -C     N
 [ dihedrals ] ; override some of the typebased dihedrals
     N    CA    CB    CG    dih_GLN_chi1_N_C_C_C
    CG    CB    CA     C    dih_GLN_chi1_C_C_C_CO
    CB    CG    CD   NE2    dih_GLN_chi3_C_C_CO_N
    CG    CD    OE1  HE1    dih_GLN_chi4_C_C_O_H
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y
    CA    +N     C     O    improper_O_C_X_Y
    CG   NE2    CD   OE1    improper_O_C_X_Y
    CD  HE21   NE2  HE22    improper_Z_N_X_Y
    HE1  OE1    CD   NE2    improper_O_C_X_Y


[ GLU ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_136   -0.120     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_274   -0.220     3
   HG1    opls_140    0.060     3
   HG2    opls_140    0.060     3
    CD    opls_271    0.700     4
   OE1    opls_272   -0.800     4
   OE2    opls_272   -0.800     4
     C    opls_235    0.500     5
     O    opls_236   -0.500     5
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   HG1
    CG   HG2
    CG    CD
    CD   OE1
    CD   OE2
     C     O
    -C     N
 [ dihedrals ] ; override some with residue-specific ones
     N    CA    CB    CG    dih_GLU_chi1_N_C_C_C
    CG    CB    CA     C    dih_GLU_chi1_C_C_C_CO
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 
    CG   OE1    CD   OE2    improper_O_C_X_Y   


[ PGLU ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_136   -0.120     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_274   -0.120     3
   HG1    opls_140    0.060     3
   HG2    opls_140    0.060     3
    CD    opls_235    0.500     4
    OE    opls_236   -0.500     4
     C    opls_235    0.500     5
     O    opls_236   -0.500     5
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   HG1
    CG   HG2
    CG    CD
    CD    OE
    CD     N
     C     O
    -C     N
 [ dihedrals ] ; override some with residue-specific ones
     N    CA    CB    CG    dih_GLU_chi1_N_C_C_C
    CG    CB    CA     C    dih_GLU_chi1_C_C_C_CO
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 
;    CG   OE1    CD   OE2    improper_O_C_X_Y   


[ GLUH ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_136   -0.120     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_136   -0.120     3
   HG1    opls_140    0.060     3
   HG2    opls_140    0.060     3
    CD    opls_267    0.520     4
   OE1    opls_269   -0.440     4
   OE2    opls_268   -0.530     5
   HE2    opls_270    0.450     5
     C    opls_235    0.500     6
     O    opls_236   -0.500     6
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   HG1
    CG   HG2
    CG    CD
    CD   OE1
    CD   OE2
   OE2   HE2
     C     O
    -C     N
 [ dihedrals ] ; override some with residue-specific ones
     N    CA    CB    CG    dih_GLU_chi1_N_C_C_C
    CG    CB    CA     C    dih_GLU_chi1_C_C_C_CO
    CG    CD   OE2   HE2    dih_sidechain_COOH_C_C_O_H
   OE1    CD   OE2   HE2    dih_sidechain_COOH_O_C_O_H
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 
    CG   OE1    CD   OE2    improper_O_C_X_Y   


[ GLY ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_223B   0.080     1
   HA1    opls_140    0.060     1
   HA2    opls_140    0.060     1
     C    opls_235    0.500     2
     O    opls_236   -0.500     2
 [ bonds ]
     N     H
     N    CA
    CA   HA1
    CA   HA2
    CA     C
     C     O
    -C     N
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 


[ HISD ] 
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_505   -0.005     2 
   HB1    opls_140    0.060     2 
   HB2    opls_140    0.060     2 
    CG    opls_508    0.015     3
   ND1    opls_503   -0.570     4
   HD1    opls_504    0.420     4
   CD2    opls_507   -0.015     5
   HD2    opls_146    0.115     5
   CE1    opls_506    0.295     6
   HE1    opls_146    0.115     6
   NE2    opls_511   -0.490     7
     C    opls_235    0.500     8
     O    opls_236   -0.500     8
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   ND1
    CG   CD2
   ND1   HD1
   ND1   CE1
   CD2   HD2
   CD2   NE2
   CE1   HE1
   CE1   NE2
     C     O
    -C     N
 [ dihedrals ] ; override some with residue-specific ones
     N    CA    CB    CG    dih_HIS_chi1_N_C_C_C
    CG    CB    CA     C    dih_HIS_chi1_C_C_C_CO
    CA    CB    CG   ND1    dih_HIS_chi2_C_C_C_N
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y
    CA    +N     C     O    improper_O_C_X_Y
   ND1   CD2    CG    CB    improper_Z_CA_X_Y
    CG   CE1   ND1   HD1    improper_Z_N_X_Y
    CG   NE2   CD2   HD2    improper_Z_CA_X_Y
   ND1   NE2   CE1   HE1    improper_Z_CA_X_Y


[ HISE ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_505   -0.005     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_507   -0.015     3
   ND1    opls_511   -0.490     3
   CD2    opls_508    0.015     4
   HD2    opls_146    0.115     4
   CE1    opls_506    0.295     5
   HE1    opls_146    0.115     5
   NE2    opls_503   -0.570     6
   HE2    opls_504    0.420     6
     C    opls_235    0.500     7
     O    opls_236   -0.500     7
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   ND1
    CG   CD2
   ND1   CE1
   CD2   HD2
   CD2   NE2
   CE1   HE1
   CE1   NE2
   NE2   HE2
     C     O
    -C     N
 [ dihedrals ] ; override some with residue-specific ones
     N    CA    CB    CG    dih_HIS_chi1_N_C_C_C
    CG    CB    CA     C    dih_HIS_chi1_C_C_C_CO
    CA    CB    CG   ND1    dih_HIS_chi2_C_C_C_N
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y  
    CA    +N     C     O    improper_O_C_X_Y  
   CE1   CD2   NE2   HE2    improper_Z_N_X_Y  
    CG   NE2   CD2   HD2    improper_Z_CA_X_Y 
   ND1   NE2   CE1   HE1    improper_Z_CA_X_Y        
   ND1   CD2   CG     CB    improper_Z_CA_X_Y     


[ HISH ]  ; also known as HISP (or HIS+)
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_505   -0.005     2 
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_510    0.215     3 
   ND1    opls_512   -0.540     4
   HD1    opls_513    0.460     4 
   CD2    opls_510    0.215     5 
   HD2    opls_146    0.115     5 
   CE1    opls_509    0.385     6 
   HE1    opls_146    0.115     6 
   NE2    opls_512   -0.540     7 
   HE2    opls_513    0.460     7 
     C    opls_235    0.500     8
     O    opls_236   -0.500     8
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   ND1
    CG   CD2
   ND1   HD1
   ND1   CE1
   CD2   HD2
   CD2   NE2
   CE1   HE1
   CE1   NE2
   NE2   HE2
     C     O
    -C     N
 [ dihedrals ] ; override some with residue-specific ones
     N    CA    CB    CG    dih_HIP_chi1_N_C_C_C
    CG    CB    CA     C    dih_HIP_chi1_C_C_C_CO
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y  
    CA    +N     C     O    improper_O_C_X_Y  
    CG   CE1   ND1   HD1    improper_Z_N_X_Y       
   CE1   CD2   NE2   HE2    improper_Z_N_X_Y  
    CG   NE2   CD2   HD2    improper_Z_CA_X_Y 
   ND1   NE2   CE1   HE1    improper_Z_CA_X_Y 
   ND1   CD2    CG    CB    improper_Z_CA_X_Y     


[ HOH ] 
; We believe SPC has slightly better properties than TIP3P...
 [ atoms ]
    OW   opls_116   -0.82      0
   HW1   opls_117    0.41      0
   HW2   opls_117    0.41      0
 [ bonds ]
    OW   HW1
    OW   HW2

[ HO4 ] 
; TIP4P
 [ atoms ]
    OW   opls_113    0.00      0
   HW1   opls_114    0.52      0
   HW2   opls_114    0.52      0
    MW   opls_115   -1.04      0
 [ bonds ]
    OW   HW1
    OW   HW2

[ HO5 ] 
; TIP5P
 [ atoms ]
    OW   opls_118    0.00      0
   HW1   opls_119    0.248     0
   HW2   opls_119    0.248     0
   LP1   opls_120   -0.248     0
   LP2   opls_120   -0.248     0
 [ bonds ]
    OW   HW1
    OW   HW2

[ ILE ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_137   -0.060     2
    HB    opls_140    0.060     2
   CG1    opls_136   -0.120     3
  HG11    opls_140    0.060     3
  HG12    opls_140    0.060     3
   CG2    opls_135   -0.180     4
  HG21    opls_140    0.060     4
  HG22    opls_140    0.060     4
  HG23    opls_140    0.060     4
    CD    opls_135   -0.180     5
   HD1    opls_140    0.060     5
   HD2    opls_140    0.060     5
   HD3    opls_140    0.060     5
     C    opls_235    0.500     6
     O    opls_236   -0.500     6
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB    HB
    CB   CG1
    CB   CG2
   CG1  HG11
   CG1  HG12
   CG1    CD
   CG2  HG21
   CG2  HG22
   CG2  HG23
    CD   HD1
    CD   HD2
    CD   HD3
     C     O
    -C     N
 [ dihedrals ] ; override some with residue-specific ones
     N    CA    CB   CG1    dih_ILE_chi1_N_C_C_C
     N    CA    CB   CG2    dih_ILE_chi1_N_C_C_C
   CG1    CB    CA     C    dih_ILE_chi1_C_C_C_CO
   CG2    CB    CA     C    dih_ILE_chi1_C_C_C_CO
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 

[ LEU ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_136   -0.120     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_137   -0.060     3
    HG    opls_140    0.060     3
   CD1    opls_135   -0.180     4
  HD11    opls_140    0.060     4
  HD12    opls_140    0.060     4
  HD13    opls_140    0.060     4
   CD2    opls_135   -0.180     5
  HD21    opls_140    0.060     5
  HD22    opls_140    0.060     5
  HD23    opls_140    0.060     5
     C    opls_235    0.500     6
     O    opls_236   -0.500     6
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG    HG
    CG   CD1
    CG   CD2
   CD1  HD11
   CD1  HD12
   CD1  HD13
   CD2  HD21
   CD2  HD22
   CD2  HD23
     C     O
    -C     N
 [ dihedrals ] ; override some with residue-specific ones
     N    CA    CB    CG    dih_LEU_chi1_N_C_C_C
    CG    CB    CA     C    dih_LEU_chi1_C_C_C_CO
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 

[ LYS ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_136   -0.120     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_136   -0.120     3
   HG1    opls_140    0.060     3
   HG2    opls_140    0.060     3
    CD    opls_136   -0.120     4
   HD1    opls_140    0.060     4
   HD2    opls_140    0.060     4
    CE    opls_906    0.060     5
   HE1    opls_911    0.060     5
   HE2    opls_911    0.060     5
    NZ    opls_900   -0.900     6 
   HZ1    opls_909    0.360     6 
   HZ2    opls_909    0.360     6 
     C    opls_235    0.500     7
     O    opls_236   -0.500     7
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   HG1
    CG   HG2
    CG    CD
    CD   HD1
    CD   HD2
    CD    CE
    CE   HE1
    CE   HE2
    CE    NZ
    NZ   HZ1
    NZ   HZ2
     C     O
    -C     N
 [ dihedrals ] ; override some with residue-specific ones
     N    CA    CB    CG    dih_LYS_chi1_N_C_C_C
    CG    CB    CA     C    dih_LYS_chi1_C_C_C_CO
    CD    CE    NZ   HZ1    dih_LYS_chi5_C_C_N_H
    CD    CE    NZ   HZ2    dih_LYS_chi5_C_C_N_H
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 


[ LYSH ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_136   -0.120     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_136   -0.120     3
   HG1    opls_140    0.060     3
   HG2    opls_140    0.060     3
    CD    opls_136   -0.120     4
   HD1    opls_140    0.060     4
   HD2    opls_140    0.060     4
    CE    opls_292    0.190     5
   HE1    opls_140    0.060     5
   HE2    opls_140    0.060     5
    NZ    opls_287   -0.300     6
   HZ1    opls_290    0.330     6
   HZ2    opls_290    0.330     6
   HZ3    opls_290    0.330     6
     C    opls_235    0.500     7
     O    opls_236   -0.500     7
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   HG1
    CG   HG2
    CG    CD
    CD   HD1
    CD   HD2
    CD    CE
    CE   HE1
    CE   HE2
    CE    NZ
    NZ   HZ1
    NZ   HZ2
    NZ   HZ3
     C     O
    -C     N
 [ dihedrals ] ; override some with residue-specific ones
     N    CA    CB    CG    dih_LYS_chi1_N_C_C_C
    CG    CB    CA     C    dih_LYS_chi1_C_C_C_CO
    CD    CE    NZ   HZ1    dih_LYS_chi5_C_C_N_H
    CD    CE    NZ   HZ2    dih_LYS_chi5_C_C_N_H
    CD    CE    NZ   HZ3    dih_LYS_chi5_C_C_N_H
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 


[ MET ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_136   -0.120     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_210    0.048     3
   HG1    opls_140    0.060     3
   HG2    opls_140    0.060     3
    SD    opls_202   -0.335     4
    CE    opls_209   -0.013     5
   HE1    opls_140    0.060     5
   HE2    opls_140    0.060     5
   HE3    opls_140    0.060     5
     C    opls_235    0.500     6
     O    opls_236   -0.500     6
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   HG1
    CG   HG2
    CG    SD
    SD    CE
    CE   HE1
    CE   HE2
    CE   HE3
     C     O
    -C     N
 [ dihedrals ] ; override some with residue-specific ones
     N    CA    CB    CG    dih_MET_chi1_N_C_C_C
    CG    CB    CA     C    dih_MET_chi1_C_C_C_CO
  [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 


[ NAC ] ; metylamide, a.k.a NMA.
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
   CH3    opls_242    0.020     2
  HH31    opls_140    0.060     2
  HH32    opls_140    0.060     2
  HH33    opls_140    0.060     2
 [ bonds ]
     N     H
     N   CH3
   CH3  HH31
   CH3  HH32
   CH3  HH33
    -C     N
 [ impropers ]
    -C    CH3     N    H      improper_Z_N_X_Y


[ NH2 ]
 [ atoms ]
     N     opls_237  -0.760     1
    H1     opls_240   0.380     1
    H2     opls_240   0.380     1
 [ bonds ]
    -C     N
     N     H1
     N     H2
 [ impropers ]
    -C     H1    N      H2       improper_Z_N_X_Y

[ NHE ]
; same as NH2
 [ atoms ]
     N     opls_237  -0.760     1
    H1     opls_240   0.380     1
    H2     opls_240   0.380     1
 [ bonds ]
    -C     N
     N     H1
     N     H2
 [ impropers ]
    -C     H1     N     H2       improper_Z_N_X_Y

[ PHE ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_149   -0.005     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_145   -0.115     2
   CD1    opls_145   -0.115     3
   HD1    opls_146    0.115     3
   CD2    opls_145   -0.115     4
   HD2    opls_146    0.115     4
   CE1    opls_145   -0.115     5
   HE1    opls_146    0.115     5
   CE2    opls_145   -0.115     6
   HE2    opls_146    0.115     6 
    CZ    opls_145   -0.115     7 
    HZ    opls_146    0.115     7
     C    opls_235    0.500     8
     O    opls_236   -0.500     8
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   CD1
    CG   CD2
   CD1   HD1
   CD1   CE1
   CD2   HD2
   CD2   CE2
   CE1   HE1
   CE1    CZ
   CE2   HE2
   CE2    CZ
    CZ    HZ
     C     O
    -C     N
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y  
    CA    +N     C     O    improper_O_C_X_Y  
    CG   CE2   CD2   HD2    improper_Z_CA_X_Y 
   CD2    CZ   CE2   HE2    improper_Z_CA_X_Y 
   CE1   CE2    CZ    HZ    improper_Z_CA_X_Y 
   CD1    CZ   CE1   HE1    improper_Z_CA_X_Y 
    CG   CE1   CD1   HD1    improper_Z_CA_X_Y 
   CD1   CD2    CG    CB    improper_Z_CA_X_Y     


[ PRO ]
 [ atoms ]
     N    opls_239   -0.140     1
    CA    opls_246    0.010     1
    HA    opls_140    0.060     1
    CB    opls_136   -0.120     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_136   -0.120     3
   HG1    opls_140    0.060     3
   HG2    opls_140    0.060     3
    CD    opls_245   -0.050     4
   HD1    opls_140    0.060     4
   HD2    opls_140    0.060     4
     C    opls_235    0.500     5
     O    opls_236   -0.500     5
 [ bonds ]
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   HG1
    CG   HG2
    CG    CD
    CD   HD1
    CD   HD2
    CD     N
     C     O
    -C     N
 [ impropers ]
    -C    CA     N    CD    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 
     

[ SER ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_157    0.145     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    OG    opls_154   -0.683     3
    HG    opls_155    0.418     3
     C    opls_235    0.500     4
     O    opls_236   -0.500     4
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    OG
    OG    HG
     C     O
    -C     N
 [ dihedrals ] ; override some of the typebased dihedrals
     N    CA    CB    OG    dih_SER_THR_chi1_N_C_C_O
     C    CA    CB    OG    dih_SER_THR_chi1_CO_C_C_O
    CA    CB    OG    HG    dih_SER_THR_chi2_C_C_OH_HO
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 


[ THR ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_158    0.205     2
    HB    opls_140    0.060     2
   OG1    opls_154   -0.683     2
   HG1    opls_155    0.418     2
   CG2    opls_135   -0.180     3
  HG21    opls_140    0.060     3
  HG22    opls_140    0.060     3
  HG23    opls_140    0.060     3
     C    opls_235    0.500     4
     O    opls_236   -0.500     4
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB    HB
    CB   OG1
    CB   CG2
   OG1   HG1
   CG2  HG21
   CG2  HG22
   CG2  HG23
     C     O
    -C     N
 [ dihedrals ] ; override some of the typebased dihedrals
     N    CA    CB   OG1    dih_SER_THR_chi1_N_C_C_O
     C    CA    CB   OG1    dih_SER_THR_chi1_CO_C_C_O
    CA    CB   OG1   HG1    dih_SER_THR_chi2_C_C_OH_HO
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 

  
[ TRP ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_136   -0.120     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_500    0.075     3  
   CD1    opls_514   -0.115     4 
   HD1    opls_146    0.115     4  
   CD2    opls_501   -0.055     5
   NE1    opls_503   -0.570     6  
   HE1    opls_504    0.420     6  
   CE2    opls_502    0.130     6
   CE3    opls_145   -0.115     7  
   HE3    opls_146    0.115     7  
   CZ2    opls_145   -0.115     8  
   HZ2    opls_146    0.115     8   
   CZ3    opls_145   -0.115     9  
   HZ3    opls_146    0.115     9  
   CH2    opls_145   -0.115     10  
   HH2    opls_146    0.115     10 
     C    opls_235    0.500     11
     O    opls_236   -0.500     11
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   CD1
    CG   CD2
   CD1   HD1
   CD1   NE1
   CD2   CE2
   CD2   CE3
   NE1   HE1
   NE1   CE2
   CE2   CZ2
   CE3   HE3
   CE3   CZ3
   CZ2   HZ2
   CZ2   CH2
   CZ3   HZ3
   CZ3   CH2
   CH2   HH2
     C     O
    -C     N
 [ dihedrals ] ; override some with residue-specific ones
     N    CA    CB    CG    dih_TRP_chi1_N_C_C_C
    CG    CB    CA     C    dih_TRP_chi1_C_C_C_CO
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y  
    CA    +N     C     O    improper_O_C_X_Y  
   CD1   CE2   NE1   HE1    improper_Z_N_X_Y   
   CE2   CH2   CZ2   HZ2    improper_Z_CA_X_Y 
   CZ2   CZ3   CH2   HH2    improper_Z_CA_X_Y 
   CH2   CE3   CZ3   HZ3    improper_Z_CA_X_Y 
   CZ3   CD2   CE3   HE3    improper_Z_CA_X_Y 
    CG   NE1   CD1   HD1    improper_Z_CA_X_Y 
   CD1   CD2    CG    CB    improper_Z_CA_X_Y   


[ TYR ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_149   -0.005     2
   HB1    opls_140    0.060     2
   HB2    opls_140    0.060     2
    CG    opls_145   -0.115     2
   CD1    opls_145   -0.115     4
   HD1    opls_146    0.115     4
   CD2    opls_145   -0.115     5
   HD2    opls_146    0.115     5
   CE1    opls_145   -0.115     6
   HE1    opls_146    0.115     6
   CE2    opls_145   -0.115     7
   HE2    opls_146    0.115     7
    CZ    opls_166    0.150     8
    OH    opls_167   -0.585     8
    HH    opls_168    0.435     8
     C    opls_235    0.500     9
     O    opls_236   -0.500     9
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB   HB1
    CB   HB2
    CB    CG
    CG   CD1
    CG   CD2
   CD1   HD1
   CD1   CE1
   CD2   HD2
   CD2   CE2
   CE1   HE1
   CE1    CZ
   CE2   HE2
   CE2    CZ
    CZ    OH
    OH    HH
     C     O
    -C     N
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y
    CA    +N     C     O    improper_O_C_X_Y
    CG   CE2   CD2   HD2    improper_Z_CA_X_Y
   CD2    CZ   CE2   HE2    improper_Z_CA_X_Y
   CD1    CZ   CE1   HE1    improper_Z_CA_X_Y
    CG   CE1   CD1   HD1    improper_Z_CA_X_Y
   CD1   CD2    CG    CB    improper_Z_CA_X_Y
   CE1   CE2    CZ    OH    improper_Z_CA_X_Y


[ VAL ]
 [ atoms ]
     N    opls_238   -0.500     1
     H    opls_241    0.300     1
    CA    opls_224B   0.140     1
    HA    opls_140    0.060     1
    CB    opls_137   -0.060     2
    HB    opls_140    0.060     2
   CG1    opls_135   -0.180     3
  HG11    opls_140    0.060     3
  HG12    opls_140    0.060     3
  HG13    opls_140    0.060     3
   CG2    opls_135   -0.180     4
  HG21    opls_140    0.060     4
  HG22    opls_140    0.060     4
  HG23    opls_140    0.060     4
     C    opls_235    0.500     5
     O    opls_236   -0.500     5
 [ bonds ]
     N     H
     N    CA
    CA    HA
    CA    CB
    CA     C
    CB    HB
    CB   CG1
    CB   CG2
   CG1  HG11
   CG1  HG12
   CG1  HG13
   CG2  HG21
   CG2  HG22
   CG2  HG23
     C     O
    -C     N
 [ dihedrals ] ; override some with residue-specific ones
    N    CA    CB    CG1    dih_VAL_chi1_N_C_C_C
    N    CA    CB    CG2    dih_VAL_chi1_N_C_C_C
   CG1    CB    CA     C    dih_VAL_chi1_C_C_C_CO
   CG2    CB    CA     C    dih_VAL_chi1_C_C_C_CO
 [ impropers ]
    -C    CA     N     H    improper_Z_N_X_Y 
    CA    +N     C     O    improper_O_C_X_Y 


[ F ]
 [ atoms ]
    F    opls_400  -1.000     0

[ CL ]
 [ atoms ]
    CL   opls_401  -1.000     0

[ BR ]
 [ atoms ]
    BR   opls_402  -1.000     0


; Aqvists cation parameters

[ LI ]
 [ atoms ]
    LI   opls_406   1.000     0 ; Jorgensen ion type would be opls_404

[ NA ]
 [ atoms ]
    NA   opls_407   1.000     0 ; Jorgensen ion type would be opls_405

[ K ]
 [ atoms ]
    K    opls_408   1.000     0

[ RB ]
 [ atoms ]
    RB   opls_409   1.000     0

[ CS ]
 [ atoms ]
    CS   opls_410   1.000     0

[ MG ]
 [ atoms ]
    MG   opls_411   2.000     0

[ CA ]
 [ atoms ]
    CA   opls_412   2.000     0

[ SR ]
 [ atoms ]
    SR   opls_413   2.000     0

[ BA ]
 [ atoms ]
    BA   opls_414   2.000     0


; Ethanol - CA is the carbon bound to the OH group
[ EtOH ]
 [ atoms ]
    CB   opls_135    -0.180    1
   HB1   opls_140     0.060    1
   HB2   opls_140     0.060    1
   HB3   opls_140     0.060    1
    CA   opls_157     0.145    2
   HA1   opls_140     0.060    2
   HA2   opls_140     0.060    2
    OH   opls_154    -0.683    2
    HO   opls_155     0.418    2
 [ bonds ]
   CB    HB1
   CB    HB2
   CB    HB3
   CB    CA
   CA    HA1
   CA    HA2
   CA    OH
   OH    HO


; New All atom DMSO model, DvdS, 17/06/2006
; Use at your own risk!
[ DMSO  ]
 [ atoms ]
OD      opls_125    -0.459      1
SD      opls_124     0.139      1
CD1     opls_139    -0.020      1
HD11    opls_140     0.060      1
HD12    opls_140     0.060      1
HD13    opls_140     0.060      1
CD2     opls_139    -0.020      1
HD21    opls_140     0.060      1
HD22    opls_140     0.060      1
HD23    opls_140     0.060      1

 [ bonds ]
    OD     SD
    SD     CD1
    SD     CD2
    CD1    HD11
    CD1    HD12
    CD1    HD13
    CD2    HD21
    CD2    HD22
    CD2    HD23