>2fxfB (B:) observed residues (from ATOM records)
akfvirpataadcsdilrlikelakyeyqviltekdlledgfgehpfyhclvaevpkehw
tpeghsivgfamyyftydpwigkllyledffvmsdyrgfgigseilknlsqvamrcrcss
mhflvaewnepsinfykrrgasdlegwrlfkidkeyllkmatee