/usr/share/gromacs/top/amber99sb.ff/aminoacids.r2b is in gromacs-data 4.5.5-2.
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 | ; rtp residue to rtp building block table
;GMX Force-field
; main N-ter C-ter 2-ter
ALA ALA NALA CALA -
ARG ARG NARG CARG -
ARGN - - - -
ASN ASN NASN CASN -
ASP ASP NASP CASP -
ASPH ASH - - -
CYS CYS NCYS CCYS -
CYS2 CYX NCYX CCYX -
GLN GLN NGLN CGLN -
QLN - - - -
GLU GLU NGLU CGLU -
GLY GLY NGLY CGLY -
GLUH GLH - - -
HISD HID NHID CHID -
HISE HIE NHIE CHIE -
HISH HIP NHIP CHIP -
ILE ILE NILE CILE -
LYSN LYN - - -
LYS LYS NLYS CLYS -
LEU LEU NLEU CLEU -
MET MET NMET CMET -
PHE PHE NPHE CPHE -
PRO PRO NPRO CPRO -
SER SER NSER CSER -
THR THR NTHR CTHR -
TRP TRP NTRP CTRP -
TYR TYR NTYR CTYR -
VAL VAL NVAL CVAL -
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