α-Ketoglutaric acid is one of two ketone derivatives of glutaric acid. (The term "ketoglutaric acid," when not further qualified, almost always refers to the alpha variant. β-Ketoglutaric acid varies only by the position of the ketone functional group, and is much less common.) Its anion, α-ketoglutarate (α-KG, also called oxo-glutarate) is an important biological compound. It is the keto acid produced by de-amination of glutamate, and is an intermediate in the Krebs cycle.
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Chemistry educational resource for 2-Oxoglutaric Acid (standard InChIKey KPGXRSRHYNQIFN-UHFFFAOYSA-N). 2-Oxopentanedioic acid (IUPAC Name); 2-Ketoglutaric Acid; 2-Oxo-1,5-pentanedioic acid; 2-Oxo-Glutaric Acid; 2-oxopentanedionic acid; Alphaketoglutaric acid; alpha-Ketoglutaric acid; alpha-keto-Glutaric acid; alpha-Oxoglutaric acid; alpha-Oxopentanedioic acid; ketoglutaric acid; Oxoglutaric acid; 2-Oxo-pentanedioic acid. Follow the page link to go to the compound page on the Learn Chemistry wiki.