>5fr1B (B:) observed residues (from ATOM records) nykppaqksiqeiqeldkddeslrkykeallvpnvvvtrltlvcstapgpleldltgdle sfkkqsfvlkegveyrikisfrvnreivsgmkyiqhtyrkgvkidktdymvgsygpraee yefltpmeeapkgmlargsyniksrftdddrtdhlswewnltikkew