>2q4fB (B:) observed residues (from ATOM records) aaalrdqltallssmfsqglvdeqfqqlqmlqdpgfvsevvtlfcddadriineiatlle qpvvnfdkvdayvhqlkgssasvgaqkvkftcmqfrqfcqdksrdgclmalavvrndfyd lrnkfqtmlqleqqiq