Chains and heterogens:
PDB Chain Sequences:
>1iyoA (A:) ansvqqqlealekssggrlgvalintadnsqilyraderfamcstskvmaaaavlkqses dkhllnqrveikksdlvnynpiaekhvngtmtlaelgaaalqysdntamnkliahlggpd kvtafarslgdetfrldrtaptlntaipgdprdtttplamaqtlknltlgkalaetqraq lvtwlkgnttgsasiraglpkswvvgdktgsgdygttndiaviwpenhaplvlvtyftqp eqkaerrrdilaaaakivthgf
>1iyoA (A:) svqqqlealekssggrlgvalintadnsqilyraderfamcstskvmaaaavlkqsesdk hllnqrveikksdlvnynpiaekhvngtmtlaelgaaalqysdntamnkliahlggpdkv tafarslgdetfrldrtaptlntaipgdprdtttplamaqtlknltlgkalaetqraqlv twlkgnttgsasiraglpkswvvgdktgsgdygttndiaviwpenhaplvlvtyftqpeq kaerrrdilaaaakivthgf