>4pxnB (B:) observed residues (from ATOM records)
keehqflaelglaqrnpgafacgawggsgptvtstsptnnqviaevveasvhdyeegmra
cfdaaktwmaipapkrgeivrqigdalraklhhlgrlvslemgkilpegigevqeiidmc
dyavglsrqlngsiipserpnhmmmevwnplgvvgvitafnfpcavlgwnacialvcgnc
vvwkgapttplitiamtkivasvleknnlpgaiftsfcggteigqaialdiriplvsftg
straglmvqqqvsarfgkcllelsgnnaiivmddadiqlavrsvlfaavgtagqrcttcr
rlilheniyqtfldqlvevykqvrigdplekgtllgplhtpaskenflkgiqtiksqggk
ilfggsaiesegnfvqptiveitpsapvvkeelfgpvlyvmkfqtlkeaieinnsvpqgl
sssiftkrpdiifkwlgphgsdcgivnvniptngaeiggafggekatgggreagsdswkq
ymrratctinygselpla