>1j74A (A:) observed residues (from ATOM records)
vkvprnfrlleeleegqkgvgdgtvswgleddedmtltrwtgmiigpprtnyenriyslk
vecgpkypeappsvrfvtkinmnginnssgmvdarsipvlakwqnsysikvvlqelrrlm
mskenmklpqppegqtynn