Chains and heterogens:
PDB Chain Sequences:
>1viwA (A:) ekdanfasgrnsivhlfewkwndiadecerflqpqgfggvqisppneylvadgrpwwery qpvsyiintrsgnesaftdmtrrcndagvriyvdavinhmtgmngvgtsgssadhdgmny pavpygsgdfhspcevnnyqdadnvrncelvglrdlnagsdyvrgvlidymnhmidlgva gfrvdaakhmspgdlsvifdglknlntdygfadgarpfiyqevidlggeaiskneytgfg cvlefqfgvslgnafqggnqlknlanwgpewgllegldavvfvdnhdnqrtggsqiltyk npkpykmaiafmlahpygttrimssfdftdndqgppqdgsgnlispginddntcsngyvc ehrwrqvygmvgfrnavegtqvenwwsnddnqiafsrgsqgfvaftnggdlnqnlntglp agtycdvisgelsggsctgksvtvgdngsadislgsaeddgvlaihvnakl
>1viwB (B:) atetsfiidafnktnlilqgdatvssngnlqlsynsydsmsrafysapiqirdsttgnva sfdtnftmnirthrqsavgldfvlvpvqdtvtvefdtflsrisidvnnndiksvpwdvhd ydgqnaevritynsstkvfsvslsnpstgksnnvsttvelekevydwvsvgfsatsgayq wsyethdvlswsfsskfi