Chains and heterogens:
PDB Chain Sequences:
>2i72A (A:) apqqindivhrtitplieqqkipgmavaviyqgkpyyftwgyadiakkqpvtqqtlfelg svsktftgvlggdaiargeiklsdpttkywpeltakqwngitllhlatytagglplqvpd evksssdllrfyqnwqpawapgtqrlyanssiglfgalavkpsglsfeqamqtrvfqplk lnhtwinvppaeeknyawgyregkavhvspgaldaeaygvkstiedmarwvqsnlkpldi nektlqqgiqlaqsrywqtgdmyqglgwemldwpvnpdsiingsdnkialaarpvkaitp ptpavraswvhktgatggfgsyvafipekelgivmlanknypnparvdaawqilnalq
>2i72B (B:) apqqindivhrtitplieqqkipgmavaviyqgkpyyftwgyadiakkqpvtqqtlfelg svsktftgvlggdaiargeiklsdpttkywpeltakqwngitllhlatytagglplqvpd evksssdllrfyqnwqpawapgtqrlyanssiglfgalavkpsglsfeqamqtrvfqplk lnhtwinvppaeeknyawgyregkavhvspgaldaeaygvkstiedmarwvqsnlkpldi nektlqqgiqlaqsrywqtgdmyqglgwemldwpvnpdsiingsdnkialaarpvkaitp ptpavraswvhktgatggfgsyvafipekelgivmlanknypnparvdaawqilnalq
>2i72B (B:) apqqindivhrtitplieqqkipgmavaviyqgkpyyftwgyadiakkqpvtqqtlfelg svsktftgvlggdaiargeiklsdpttkywpeltakqwngitllhlatytagglplqvpd evksssdllrfyqnwqpawapgtqrlyanssiglfgalavkpsglsfeqamqtrvfqplk lnhtwinvppaeeknyawgyregkavhvspgaldaeaygvkstiedmarwvqsnlkpldi nektlqqgiqlaqsrywqtgdmyqglgwemldwpvnpdsaarpvkaitpptpavraswvh ktgatggfgsyvafipekelgivmlanknypnparvdaawqilnalq