Main Reaction: 2-keto-butyrate >> propionyl-CoA

Reference: PubMed ID: 25250846
Authors: Haushalter RW, Kim W, Chavkin TA, The L, Garber ME, Nhan M, Adams PD, Petzold CJ, Katz L, Keasling JD
Title: Production of anteiso-branched fatty acids in Escherichia coli; next generation biofuels with improved cold-flow properties.
Published: 2014 Nov

2-keto-butyrate --> propionyl-CoA