DL Leucine is a branched-chain amino acid that consists of glycine in which one of the hydrogens attached to the alpha-carbon is substituted by anisobutyl group. It has a role as a Daphnia magna metabolite. It is abranched-chain amino acid and an alpha-amino acid. It contains an is obutylgroup. It is a conjugate base of a leucinium. It is a conjugate acid of a leucinate.DL-Leucine may be used for the evaluation of chiral amino acid separation techniques.