1IO9:
reference: Thermophilic cytochrome P450 (CYP119) from Sulfolobus solfataricus: high resolution structure and functional properties., Park SY, Yamane K, Adachi S, Shiro Y, Weiss KE, Maves SA, Sligar SG, J Inorg Biochem. 2002 Sep 20;91(4):491-501. PMID: 12237217

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