This file is indexed.

/usr/share/EMBOSS/test/data/prot.m-nbrf is in emboss-test 6.4.0-2.

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

The actual contents of the file can be viewed below.

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>P1;NBRFM1
NBRF FORMAT PROTEIN SEQUENCE N20001, 100 bases
 ACDEFGHIKL MNPQRSTVWY ACDEFGHIKL MNPQRSTVWY ACDEFGHIKL
 MNPQRSTVWY ACDEFGHIKL MNPQRSTVWY ACDEFGHIKL MNPQRSTVWY*

>P1;NBRFM2
NBRF FORMAT PROTEIN SEQUENCE N20002, 80 bases
 AACCDDEEFF GGHHIIKKLL MMNNPPQQRR SSTTVVWWYY AACCDDEEFF
 GGHHIIKKLL MMNNPPQQRR SSTTVVWWYY*

>P1;NBRFM3
NBRF FORMAT PROTEIN SEQUENCE N20003, 60 bases
 AAACCCDDDE EEFFFGGGHH HIIIKKKLLL MMMNNNPPPQ QQRRRSSSTT
 TVVVWWWYYY*