>1u4fA (A:) observed residues (from ATOM records) srfvkkdghcnvqfinvgekrnetlvfshnaviamrdgklclmwrvgnlrkshlveahvr aqllksritsegeyipldqidinvgfdsgidriflvspitivheidedsplydlskqdid nadfeivvilegmveatamttqcrssylaneilwghryepvlfeekhyykvdysrfhkty evpntplcsardlaekk