Chains and heterogens:
PDB Chain Sequences:
>2fkfA (A:) stakaptlpasifraydirgvvgdtltaetaywigraigseslargepcvavgrdgrlsg pelvkqliqglvdcgcqvsdvgmvptpvlyyaanvlegksgvmltgshnppdyngfkivv agetlaneqiqalreriekndlasgvgsveqvdilpryfkqirddiamakpmkvvvdcgn gvagviapqliealgcsviplycevdgnfpnhhpdpgkpenlkdliakvkaenadlglaf dgdgdrvgvvtntgtiiypdrllmlfakdvvsrnpgadiifdvkctrrlialisgyggrp vmwktghslikkkmketgallagemsghvffkerwfgfddgiysaarlleilsqdqrdse hvfsafpsdistpeinitvtedskfaiiealqrdaqwgegnittldgvrvdypkgwglvr asnttpvlvlrfeadteeeleriktvfrnqlkavdsslpvpf
>2fkfA (A:) lpasifraydirgvvgdtltaetaywigraigseslargepcvavgrdgrlsgpelvkql iqglvdcgcqvsdvgmvptpvlyyaanvlegksgvmltgshnppdyngfkivvagetlan eqiqalreriekndlasgvgsveqvdilpryfkqirddiamakpmkvvvdcgngvagvia pqliealgcsviplycevdgnfpnhhpdpgkpenlkdliakvkaenadlglafdgdgdrv gvvtntgtiiypdrllmlfakdvvsrnpgadiifdvkctrrlialisgyggrpvmwktgh slikkkmketgallagemsghvffkerwfgfddgiysaarlleilsqdqrdsehvfsafp sdistpeinitvtedskfaiiealqrdaqwgegnittldgvrvdypkgwglvrasnttpv lvlrfeadteeeleriktvfrnqlkavdsslpvpf