This file is indexed.

/usr/share/gromacs/top/oplsaa.ff/aminoacids.c.tdb 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.

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[ None ]

[ GLY-COO- ]
[ replace ]
CA	CA	opls_284	12.011	-0.02
C	C	opls_271	12.011	0.7
O	O1	opls_272	15.9994	-0.8
OXT	O2	opls_272	15.9994	-0.8
[ add ]
2	8	O	C	CA	N
	opls_272	15.9994	-0.8
[ impropers ]
CA	O1	C	O2	improper_O_C_X_Y

[ GLY-ZWITTERION_COO- ]
[ replace ]
CA	CA	opls_298	12.011	0.09
C	C	opls_271	12.011	0.7
O	O1	opls_272	15.9994	-0.8
OXT	O2	opls_272	15.9994	-0.8
[ add ]
2	8	O	C	CA	N
	opls_272	15.9994	-0.8
[ impropers ]
CA	O1	C	O2	improper_O_C_X_Y

[ PRO-COO- ]
[ replace ]
CA	CA	opls_285	12.011	-0.09
C	C	opls_271	12.011	0.7
O	O1	opls_272	15.9994	-0.8
OXT	O2	opls_272	15.9994	-0.8
[ add ]
2	8	O	C	CA	N
	opls_272	15.9994	-0.8
[ impropers ]
CA	O1	C	O2	improper_O_C_X_Y

[ PRO-ZWITTERION_COO- ]
[ replace ]
CA	CA	opls_246	12.011	0.13
C	C	opls_271	12.011	0.7
O	O1	opls_272	15.9994	-0.8
OXT	O2	opls_272	15.9994	-0.8
[ add ]
2	8	O	C	CA	N
	opls_272	15.9994	-0.8
[ impropers ]
CA	O1	C	O2	improper_O_C_X_Y

[ COO- ]
[ replace ]
CA	CA	opls_283	12.011	0.04
C	C	opls_271	12.011	0.7
O	O1	opls_272	15.9994	-0.8
OXT	O2	opls_272	15.9994	-0.8
[ add ]
2	8	O	C	CA	N
	opls_272	15.9994	-0.8
[ impropers ]
CA	O1	C	O2	improper_O_C_X_Y

[ ZWITTERION_COO- ]
[ replace ]
CA	CA	opls_299	12.011	0.15
C	C	opls_271	12.011	0.7
O	O1	opls_272	15.9994	-0.8
OXT	O2	opls_272	15.9994	-0.8
[ add ]
2	8	O	C	CA	N
	opls_272	15.9994	-0.8
[ impropers ]
CA	O1	C	O2	improper_O_C_X_Y

[ GLY-COOH ]
[ replace ]
C	C	opls_267	12.011	0.52
O	O	opls_268	15.9994	-0.53
OXT	OT	opls_269	15.9994	-0.44
[ add ]
1	2	OT	C	CA	N
	opls_269	15.9994	-0.44
1	2	HO	O	C	CA
	opls_270	1.008	0.45
[ impropers ]
CA	OT	C	O	improper_O_C_X_Y

[ COOH ]
[ replace ]
C	C	opls_267	12.011	0.52
O	O	opls_268	15.9994	-0.53
OXT	OT	opls_269	15.9994	-0.44
[ add ]
1	2	OT	C	CA	N
	opls_269	15.9994	-0.44
1	2	HO	O	C	CA
	opls_270	1.008	0.45
[ impropers ]
CA	OT	C	O	improper_O_C_X_Y