>3sfeC (C:) observed residues (from ATOM records)
gttakeemerfwnknlgsnrplsphitiyrwslpmamsichrgtgialsagvslfglsal
llpgnfeshlelvkslclgptliytakfgivfplmyhtwngirhliwdlgkgltipqltq
sgvvvliltvlssvglaam