>5nfrB (B:) observed residues (from ATOM records)
mtkialigsgqigaivgelcllenlgdlilydvvpgipqgkaldlkhfstilgvnrnilg
tnqiedikdadiivitagvqrkegmtredligvngkimksvaesvklhcskafvicvsnp
ldimvnvfhkfsnlphekicgmagildtsrycsliadklkvsaedvnavilgghgdlmvp
lqrytsvngvplsefvkknmisqneiqeiiqktrnmgaeiiklakasaafapaaaitkmi
ksylynennlftcavylnghyncsnlfvgstakinnkgahpvefpltkeeqdlytesias
vqsntqkafdlik