page_title: Imino acid
hierarchical_section_title: Imino acid
context_page_description: In chemistry, an imino acid is any molecule that contains both imine and carboxyl functional groups.
  Imino acids are related to amino acids, which contain both amino and carboxyl 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-Δ¹-pyrroline-5-carboxylate.
context_section_description: In chemistry, an imino acid is any molecule that contains both imine (>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).
caption: 1-Pyrroline-5-carboxylic acid, an N-substituted imino acid