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