4OKA:
reference: Structural, Kinetic, and Docking Studies of Artificial Imine Reductases Based on Biotin-Streptavidin Technology: An Induced Lock-and-Key Hypothesis., Robles VM, Durrenberger M, Heinisch T, Lledos A, Schirmer T, Ward TR, Marechal JD, J Am Chem Soc. 2014 Oct 28. PMID: 25317660

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