L-Leucine by MP Biomedicals is a high purity amino acid. This is an -amino acid which contains an -amino group, an -carboxylic acid, and a side chain isobutyl group, making it a non-polar aliphatic amino acid. This preparation is available as a white powder which is Soluble in water and sparingly soluble in alcohol. It is essential in humans, since the body cannot synthesize it. Along with lysine, it is one of the two exclusively ketogenic amino acids because the products of its breakdown are acetyl-CoA and acetoacetate. CAS No. 61-90-5 Quantity Provided: 25 gm per pack Molecular Formula: C6H13NO2 Molecular Weight: 131.18 Soluble in water L-Leucine is widely used in chemical and biological sectors. Leucine has been used as a molecular marker in the recovery of DNA from palaeontological samples for PCR analysis. In the food industry, L-leucine is used as E641, and is classified as a flavour enhancer. It has the capacity to directly stimulate muscle protein synthesis. Leucine potently activates the mammalian target of rapamycin kinase that regulates cell growth.