>3b13B (B:) observed residues (from ATOM records)
mqaikcvvvgdgavgkncllisyttnafpgeyiptvfdnysanvmvdgkpvnlglwdtag
qedydrlrplsypqtdvflicfslvspasfenvrakwypevrhhcpntpiilvgtkldlr
ddkdtieklkekkltpitypqglamakeigavkylecsaltqrglktvfdeairavl