Chains and heterogens:
PDB Chain Sequences:
>1fvgA (A:) kivspqealpgrkeplvvaakhhvngnrtvepfpegtqmavfgmgcfwgaerkfwtlkgv ystqvgfaggytpnptykevcsgktghaevvrvvfqpehisfeellkvfwenhdptqgmr qgndhgsqyrsaiyptsaehvgaalkskedyqkvlsehgfglittdiregqtfyyaedyh qqylskdpdgyc