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|Section2= |Section6= |Section7= }} Glutamine (abbreviated as Gln or Q, and often called L-glutamine) is one of the 20 amino acids encoded by the standard genetic code. It is considered conditionally essential.〔Dietary Reference Intakes: The Essential Guide to Nutrient Requirements, published by the Institute of Medicine's Food and Nutrition Board, currently available online at http://fnic.nal.usda.gov/dietary-guidance/dietary-reference-intakes/dri-reports〕 In human blood, glutamine is the most abundant free amino acid, with a concentration of about 500–900 µmol/l. The side-chain is an amide formed by replacing the side-chain hydroxyl of glutamic acid with an amine functional group, making it the amide of glutamic acid. Gln's codons are CAA and CAG. == Functions == Glutamine plays a role in a variety of biochemical functions: * Protein synthesis, as any other of the 20 proteinogenic amino acids * Regulation of acid-base balance in the kidney by producing ammonium * Cellular energy, as a source, next to glucose * Nitrogen donation for many anabolic processes, including the synthesis of purines〔 * Carbon donation, as a source, refilling the citric acid cycle * Nontoxic transporter of ammonia in the blood circulation 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Glutamine」の詳細全文を読む スポンサード リンク
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