>1gn4B (B:) observed residues (from ATOM records)
aeytlpdldwdygalephisgqinelhhskhhatyvkgandavakleearakedhsaill
neknlafnlaghvnhtiwwknlspnggdkptgelaaaiadafgsfdkfraqfhaaattvq
gsgwaalgwdtlgnkllifqvydeqtnfplgivplllldmwehafylqyknvkvdfakaf
wnvvnwadvqsryaaats