Catalyzes the interconversion of 2-phosphoglycerate and 3-phosphoglyceratea crucial step in glycolysis, by using 2,3-bisphosphoglycerate . Also catalyzes the interconversion of (2R)-2,3-bisphosphoglycerate and (2R)-3-phospho-glyceroyl phosphate .
Expressed in the liver and brain. Not found in the muscle.