2F99:
reference: Crystal Structure of the Polyketide Cyclase AknH with Bound Substrate and Product Analogue: Implications for Catalytic Mechanism and Product Stereoselectivity., Kallio P, Sultana A, Niemi J, Mantsala P, Schneider G, J Mol Biol. 2006 Jan 6;. PMID: 16414075

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