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Reference.org
3-Phosphoglyceric acid
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<p>3-Phosphoglyceric acid (3PG, 3-PGA, or PGA) is the conjugate acid of 3-phosphoglycerate or glycerate 3-phosphate (GP or G3P). This glycerate is a <a href="/facts/Biochemistry/fa2pWEBp">biochemically</a> significant metabolic intermediate in both <a href="/facts/Glycolysis/a5ApxLoG">glycolysis</a> and the <a href="/facts/Calvin-Benson_cycle/M1bIgQb9">Calvin-Benson cycle</a>. The anion is often termed as PGA when referring to the Calvin-Benson cycle. In the Calvin-Benson cycle, 3-phosphoglycerate is typically the product of the spontaneous scission of an unstable 6-carbon intermediate formed upon CO2 fixation. Thus, two equivalents of 3-phosphoglycerate are produced for each molecule of CO2 that is fixed. In glycolysis, 3-phosphoglycerate is an intermediate following the <a href="/facts/Dephosphorylation/WkeXmpgs">dephosphorylation</a> (<a href="/facts/Redox/Pyd5RVcj">reduction</a>) of <a href="/facts/1,3-bisphosphoglycerate/aL6aR6ha">1,3-bisphosphoglycerate</a>.: 14 </p>