Chains and heterogens:
PDB Chain Sequences:
>1apwE (E:) aasgvatntptandeeyitpvtiggttlnlnfdtgsadlwvfstelpasqqsghsvynps atgkelsgytwsisygdgssasgnvftdsvtvggvtahgqavqaaqqisaqfqqdtnndg llglafssintvqpqsqttffdtvksslaqplfavalkhqqpgvydfgfidsskytgslt ytgvdnsqgfwsfnvdsytagsqsgdgfsgiadtgttllllddsvvsqyysqvsgaqqds naggyvfdcstnlpdfsvsisgytatvpgslinygpsgdgstclggiqsnsgigfsifgd iflksqyvvfdsdgpqlgfapqa