>3rz3B (B:) observed residues (from ATOM records)
spssqkalllelkglqeepvegfrvtlvdegdlynwevaifgppntyyeggyfkarlkfp
idypysppafrfltkmwhpniyetgdvcisilerwnptqnvrtillsvisllnepntfsp
anvdasvmyrkwkeskgkdreytdiirkqvlgtkvdaerdgvkv