Chains and heterogens:
PDB Chain Sequences:
>1zsa_ (-) shhwgygkhngpehwhkdfpiakgerqspvdidthtakydpslkplsvsydqatslriln nghafnvefddsqdkavlkggpldgtyrliqfhfhwgsldgqgsehtvdkkkyaaqlhlv hwntkygdfgkavqqpdglavlgiflkvgsakpglqkvvdvldsiktkgksadftnfdpr gllpesldywtypgslttppllecvtwivlkepisvsseqvlkfrklnfngegepeelmv dnwrpaqplknrqikasfk
>1zsa_ (-) hwgygkhngpehwhkdfpiakgerqspvdidthtakydpslkplsvsydqatslrilnng hafnvefddsqdkavlkggpldgtyrliqfhfhwgsldgqgsehtvdkkkyaaqlhlvhw ntkygdfgkavqqpdglavlgiflkvgsakpglqkvvdvldsiktkgksadftnfdprgl lpesldywtypgslttppllecvtwivlkepisvsseqvlkfrklnfngegepeelmvdn wrpaqplknrqikasfk