Final answer:
The conversion from 2 1,3-bisphosphoglycerate to 2 3-phosphoglycerate in glycolysis involves the formation of ATP through substrate-level phosphorylation and the isomerization of 3-phosphoglycerate to 2-phosphoglycerate, mediated by specific enzymes.
Step-by-step explanation:
The conversion of 2 1,3-bisphosphoglycerate to 2 3-phosphoglycerate is a crucial step in the metabolic pathway known as glycolysis. This process occurs during the seventh step, catalyzed by the enzyme phosphoglycerate kinase. 1,3-bisphosphoglycerate donates a high-energy phosphate to ADP, yielding one molecule of ATP, through substrate-level phosphorylation. During this reaction, a carbonyl group on the 1,3-bisphosphoglycerate is oxidized to a carboxyl group, and 3-phosphoglycerate is formed.
Subsequently, in the eighth step, the enzyme phosphoglycerate mutase facilitates an isomerization reaction. It moves the remaining phosphate group from the third carbon to the second carbon on 3-phosphoglycerate, producing 2-phosphoglycerate. These steps occur for each molecule of glucose processed in glycolysis, meaning they happen twice, which helps to balance the two ATP molecules consumed earlier in glycolysis.