>2a4dA (A:) observed residues (from ATOM records) gvkvprnfrlleeleegqkgvgdgtvswgleddedmtltrwtgmiigpprtiyenriysl kiecgpkypeappfvrfvtkinmngvnssngvvdpraisvlakwqnsysikvvlqelrrl mmskenmklpqppegqcys