Chains and heterogens:
PDB Chain Sequences:
>2yokA (A:) eqvctqqaethppltwqkctasgctpqqgsvvldanwrwthdtksttncydgntwsstlc pddatcaknccldganysgtygvttsgdaltlqfvtasnvgsrlylmandstyqeftlsg nefsfdvdvsqlpcglngalyfvsmdadggqskypgnaagakygtgycdsqcprdlkfin gqanvegwepssnnantgvgghgsccsemdiweansisealtphpcetvgqtmcsgdscg gtysndryggtcdpdgcdwnpyrlgntsfygpgssfaldttkkltvvtqfatdgsisryy vqngvkfqqpnaqvgsysgntintdycaaeqtafggtsftdkgglaqinkafqggmvlvm slwddyavnmlwldstyptnatastpgakrgscstssgvpaqveaqspnskviysnirfg pigstg