>2pkfB (B:) observed residues (from ATOM records)
gtedlyfqhmtiavtgsiatdhlmrfpgrfseqllpehlhkvslsflvddlvmhrggvag
nmafaigvlggevalvgaagadfadyrdwlkargvncdhvlisetahtarftcttdvdma
qiasfypgamsearnikladvvsaigkpelviigandpeamflhteecrklglafaadps
qqlarlsgeeirrlvngaaylftndyewdlllsktgwseadvmaqidlrvttlgpkgvdl
vepdgttihvgvvpetsqtdptgvgdafragfltgrsaglglersaqlgslvavlvlest
gtqewqwdyeaaasrlagaygehaaaeivavla