>3n1fB (B:) observed residues (from ATOM records) lvplaykqfspnvpektlgasgryegkiarsserfkeltpnynpdiifkdeentgadrlm tqrckdrlnslaisvmnqwpgvklrvtegwdedghhseeslhyegravdittsdrdrnky gllarlaveagfdwvyyeskahvhcsvkse