/usr/share/gromacs/top/gmx.ff/fa.itp is in gromacs-data 4.6.5-1build1.
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 | ; topology voor lauroic acid. Peter Tieleman, April 2 1995
[ moleculetype ]
;name nrexcl
LAU 3
[ atoms ]
; nr type resnr residu atom cgnr charge ; total charge
1 HO 1 LAU H2 1 0.398 ; 0.398 Lading van GLUH PT 21/4/95
2 OA 1 LAU O4 1 -0.548 ; -0.150
3 C 1 LAU C3 1 0.53 ; 0.38
4 O 1 LAU O5 1 -0.38 ; 0
5 CP2 1 LAU C4 2 0
6 CP2 1 LAU C5 3 0
7 CP2 1 LAU C6 4 0
8 CP2 1 LAU C7 5 0
9 CP2 1 LAU C8 6 0
10 CP2 1 LAU C9 7 0
11 CP2 1 LAU C10 8 0
12 CP2 1 LAU C11 9 0
13 CP2 1 LAU C12 10 0
14 CP2 1 LAU C13 11 0
15 CP3 1 LAU C14 12 0
[ bonds ]
;
; ai aj funct c0 c1
1 2 1 ;
2 3 1 ;
3 4 1 ;
3 5 1 ;
5 6 1 ;
6 7 1 ;
7 8 1 ;
8 9 1 ;
9 10 1 ;
10 11 1 ;
11 12 1 ;
12 13 1 ;
13 14 1 ;
14 15 1 ;
[ pairs ]
; ai aj funct c0 c1
; 1 4 1 ; taken out, causes trouble when using SHAKE
1 5 1 ;
2 6 1 ;
3 7 1 ;
4 6 1 ;
; Klopt dit?
[ angles ]
; ai aj ak funct
1 2 3 1
2 3 4 1
2 3 5 1
4 3 5 1
3 5 6 1
5 6 7 1
6 7 8 1
7 8 9 1
8 9 10 1
9 10 11 1
10 11 12 1
11 12 13 1
12 13 14 1
13 14 15 1
[ dihedrals ]
; ai aj ak al funct
1 2 3 5 1
1 2 3 4 1
2 3 5 6 1
4 3 5 6 1
3 5 6 7 1
5 6 7 8 3
6 7 8 9 3
7 8 9 10 3
8 9 10 11 3
9 10 11 12 3
10 11 12 13 3
11 12 13 14 3
12 13 14 15 3
[ dihedrals ]
; ai aj ak al funct
3 2 5 4 2
|