Chains and heterogens:
PDB Chain Sequences:
>1iz0A (A:) mkawvlkrlggplelvdlpepeaeegevvlrveavglnfadhlmrlgayltrlhppfipg mevvgvvegrryaalvpqgglaervavpkgallplpeglspeeaaafpvsfltaylalkr aqarpgekvlvqaaagalgtaavqvaramglrvlaaasrpeklalplalgaeeaatyaev perakawggldlvlevrgkeveeslgllahggrlvyigaaegevapipplrlmrrnlavl gfwltpllregalveealgfllprlgrelrpvvgpvfpfaeaeaafralldrghtgkvvv rl
>1iz0A (A:) mkawvlkrlggplelvdlpepeaeegevvlrveavglnfadhlmrlgayltrlhppfipg mevvgvvegrryaalvpqgglaervavpkgallplpeglspeeaaafpvsfltaylalkr aqarpgekvlvqaaagalgtaavqvaramglrvlaaasrpeklalplalgaeeaatyaev perakawggldlvlevrgkeveeslgllahggrlvyiapipplrlmrrnlavlgfwltpl lregalveealgfllprlgrelrpvvgpvfpfaeaeaafralldrghtgkvvvrl