4EP6:
reference: Unusual spectroscopic and ligand binding properties of the cytochrome P450-flavodoxin fusion enzyme XplA., Bui SH, McLean KJ, Cheesman MR, Bradley JM, Rigby SE, Levy CW, Leys D, Munro AW, J Biol Chem. 2012 Apr 12. PMID: 22500029

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