3AH3:
reference: Enhancement of the latent 3-isopropylmalate dehydrogenase activity of promiscuous homoisocitrate dehydrogenase by directed evolution., Suzuki Y, Asada K, Miyazaki J, Tomita T, Kuzuyama T, Nishiyama M, Biochem J. 2010 Oct 11;431(3):401-10. PMID: 20735360

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