PGAL Full Form

What is Full Form of PGAL?

PGAL stands for 3-PhosphoGlyceraldehyde or triose phosphate or glyceraldehyde phosphate. This glycerate is an important biochemical intermediate in both glycolysis and the Calvin-Benson cycle. When referring to the Calvin-Benson cycle, the anion is frequently referred to as PGA. 3-phosphoglycerate is primary product of the spontaneous scission of an unstable 6-carbon intermediate formed during CO2 fixation in the Calvin-Benson cycle. For each molecule of CO2 fixed, two equivalents of 3-phosphoglycerate are produced. 3-phosphoglycerate is an intermediate in glycolysis that occurs after the dephosphorylation (reduction) of 1,3-bisphosphoglycerate. Two molecules of PGAL are rearranged in a series of steps to form six-carbon glucose.

PGAL in Calvin cycle

• G3P, DHAP, 3-PGA, and 1,3-DPGA are metabolites of higher plants' photosynthetic carbon reduction cycle (Calvin cycle).

• In step 1, Ru1,5P reacts with CO2 and water to form an intermediate that is quickly cleaved into two molecules of 3-PGA.

• In step 2, ATP phosphorylates 3-PGA to form 1,3-DPGA.

• In step 3, NADH reduces 1,3-DPGA to G3P by removing the phosphate group at C1.

• G3P is then converted into its isomer DHAP in step 4.

• In step 5, DHAP condenses with G3P to form F1,6P or E4P to form Se1,7P.

• In step 6, G3P combines with F6P to form Xu5P and E4P, or with Se7P to form Xu5P and R5P.

All of these reactions take place within the chloroplast, which is found only in plants.