>4nf0A (A:) observed residues (from ATOM records)
pvvikfshvvsddtpkgkgallfkklaeerlpgkvkvevypnstlfgdadeiealrankv
qmlatslskfepytkqlqvfdlpflfddlealkrfqkrdksrellrsmakhgiyglaywn
ngmkqlsatrelhrpddakglvfriqpssvleaqfamlgatakqlsyaetlkamqagsvq
gtentwsnlagqkidsvqpyitetnhgalsymlitssafwtgipyqtrtelesivdevtl
vvnkeaealnqkerehllaagksrlvslsaeeheawrnamkplwknyeaqi