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|Section2= |Section7= }} Alanine (abbreviated as Ala or A) is a non-polar α-amino acid, with the formula CH3CH(NH2)COOH. The L-isomer (left-handed) of alanine is one of the 20 amino acids encoded by the human genetic code. Its genetic codons are GCU, GCC, GCA, and GCG. L-Alanine is second only to leucine in rate of occurrence, accounting for 7.8% of the primary structure in a sample of 1,150 proteins.〔.〕 The right-handed form, D-Alanine occurs in bacterial cell walls and in some peptide antibiotics. ==Structure== The α-carbon atom of alanine is bound to a methyl group (-CH3), making it one of the simplest α-amino acids and also results in alanine's classification as an aliphatic amino acid. The methyl group of alanine is non-reactive and is thus almost never directly involved in protein function. 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「alanine」の詳細全文を読む スポンサード リンク
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