5KJD:
reference: Key residues for catalytic function and metal coordination in a carotenoid cleavage dioxygenase., Sui X, Zhang J, Golczak M, Palczewski K, Kiser PD, J Biol Chem. 2016 Jul 24. pii: jbc.M116.744912. PMID: 27453555

This OCA Structure page
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