Chains and heterogens:
PDB Chain Sequences:
>2pkfA (A:) gtedlyfqshmtiavtgsiatdhlmrfpgrfseqllpehlhkvslsflvddlvmhrggva gnmafaigvlggevalvgaagadfadyrdwlkargvncdhvlisetahtarftcttdvdm aqiasfypgamsearnikladvvsaigkpelviigandpeamflhteecrklglafaadp sqqlarlsgeeirrlvngaaylftndyewdlllsktgwseadvmaqidlrvttlgpkgvd lvepdgttihvgvvpetsqtdptgvgdafragfltgrsaglglersaqlgslvavlvles tgtqewqwdyeaaasrlagaygehaaaeivavla
>2pkfA (A:) edlyfqshmtiavtgsiatdhlmrfpgrfseqllpehlhkvslsflvddlvmhrggvagn mafaigvlggevalvgaagadfadyrdwlkargvncdhvlisetahtarftcttdvdmaq iasfypgamsearnikladvvsaigkpelviigandpeamflhteecrklglafaadpsq qlarlsgeeirrlvngaaylftndyewdlllsktgwseadvmaqidlrvttlgpkgvdlv epdgttihvgvvpetsqtdptgvgdafragfltgrsaglglersaqlgslvavlvlestg tqewqwdyeaaasrlagaygehaaaeivavla
>2pkfB (B:) gtedlyfqshmtiavtgsiatdhlmrfpgrfseqllpehlhkvslsflvddlvmhrggva gnmafaigvlggevalvgaagadfadyrdwlkargvncdhvlisetahtarftcttdvdm aqiasfypgamsearnikladvvsaigkpelviigandpeamflhteecrklglafaadp sqqlarlsgeeirrlvngaaylftndyewdlllsktgwseadvmaqidlrvttlgpkgvd lvepdgttihvgvvpetsqtdptgvgdafragfltgrsaglglersaqlgslvavlvles tgtqewqwdyeaaasrlagaygehaaaeivavla
>2pkfB (B:) gtedlyfqhmtiavtgsiatdhlmrfpgrfseqllpehlhkvslsflvddlvmhrggvag nmafaigvlggevalvgaagadfadyrdwlkargvncdhvlisetahtarftcttdvdma qiasfypgamsearnikladvvsaigkpelviigandpeamflhteecrklglafaadps qqlarlsgeeirrlvngaaylftndyewdlllsktgwseadvmaqidlrvttlgpkgvdl vepdgttihvgvvpetsqtdptgvgdafragfltgrsaglglersaqlgslvavlvlest gtqewqwdyeaaasrlagaygehaaaeivavla