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In chemistry, an imino acid is any molecule that contains both imino (>C=NH) and carboxyl (-C(=O)-OH) functional groups. Imino acids are related to amino acids, which contain both amino (-NH2) and carboxyl (-COOH) functional groups, differing in the bonding to the nitrogen. The D-amino acid oxidase enzymes are able to convert amino acids into imino acids. Also the direct biosynthetic precursor to the amino acid proline is the imino acid (''S'')-Δ1-pyrroline-5-carboxylate (P5C). == Related terminology == Amino acids containing a secondary amine group (the only proteinogenic amino acid of this type is proline) are sometimes named imino acids,〔http://opbs.okstate.edu/5753/Amino%20Acids.html〕 though this usage is obsolescent. The term imino acid is also the obsolete term for imidic acids, containing the -C(=NH)-OH group, and should not be used for them.〔 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「imino acid」の詳細全文を読む スポンサード リンク
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