1,3-Bisphosphoglycerate phosphoryl-transfer potential

The energy of oxidation is initially trapped as a high-phosphoryl-transfer-potential compound and then used to form ATP, The oxidation energy of a carbon atom is transformed into phosphoryl-transfer potential, first as 1, 3-bisphosphoglycerate and ultimately as ATP. We will consider these reactions in mechanistic detail on p. 440. 

Bisphosphoglycerate is an acyl phosphate, which is a mixed anhydride of phosphoric acid and a carboxylic acid. Such compounds have a high phosphoryl-transfer potential one of its phosphoryl groups is transferred to ADP in the next step in glycolysis. 

For reasons similar to those discussed for ATP (Section 14.1.4), 1,3-bisphosphoglycerate has a high phosphoryl transfer potential. Thus, the cleavage of 1,3-BPG can be coupled to the synthesis of ATP. 

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