>1utbB (B:) observed residues (from ATOM records)
yalntlqtalttrdsfdpfastrtfnlamtdigemyfmpplmealaqraphiqistlrpn
agnlsedmesgavdlalgllpelqtgffqrrlfrhryvcmfrkdhpsakspmslkqfsel
ehvgvvalntghgevdglleragikrrmrlvvphfiaigpilhstdliatvperfavrce
vpfglttsphpaklpdiainlfwhakynrdpgnmwlrqlfvelfsea