>1fstB (B:) observed residues (from ATOM records)
lgrvavsadpnvpnvvvtgltlvcssapgpleldltgdlesfkkqsfvlkegveyrikis
frvnreivsgmkyiqhtyragvaidatdymvgsygpraeeyefltpveeapkgmlargsy
siksrftdddktdhlswewnltikkdwk