Main Reaction: alpha–Ketobutyrate + pyruvate >> isoleucine

Reference: PubMed ID: 22556357
Authors: Chen WM, Prell J, James EK, Sheu DS, Sheu SY
Title: Biosynthesis of branched-chain amino acids is essential for effective symbioses between betarhizobia and Mimosa pudica.
Published: 2012 Jul

alpha–Ketobutyrate + pyruvate --> isoleucine