Chains and heterogens:
PDB Chain Sequences:
>1bswA (A:) fqrymeivivvdhsmvkkyngdsdsikawvyemintitesysylkidislsgleiwsgkd lidveasagntlksfgewrakdlihrishdnaqlltatdfdgatiglayvasmcnpkrsv gviqdhssvnrlvaitlahemahnlgvshdegscscggkscimspsisdetikyfsdcsy iqcrdyiakenppciln