>1p91B (B:) observed residues (from ATOM records)
sfscplchqplsreknsyicpqrhqfdmakegyvnllpdsaemmqarrafldaghyqplr
daivaqlrerlddkatavldigcgegyythafadalpeittfgldvskvaikaaakrypq
vtfcvasshrlpfsdtsmdaiiriyapckaeelarvvkpggwvitatpgprhlmelkgli
ynevhlhaphaeqlegftlqqsaelcypmrlrgdeavallqmtpfawrakpevwqtlaak
evfdcqtdfnihlwqrsy