4EEX:
reference: Structure-guided engineering of Lactococcus lactis alcohol dehydrogenase LlAdhA for improved conversion of isobutyraldehyde to isobutanol., Liu X, Bastian S, Snow CD, Brustad EM, Saleski TE, Xu JH, Meinhold P, Arnold FH, J Biotechnol. 2012 Sep 3. pii: S0168-1656(12)00610-4. doi:, 10.1016/j.jbiotec.2012.08.008. PMID: 22974724

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