alpha-D-glucose 6-phosphate + (2R)-3-phospho-glyceroyl phosphate <=> alpha-D-glucose 1,6-bisphosphate + (2R)-3-phosphoglycerate + H(+)
alpha-d-glucose 6-phosphate + (2r)-3-phospho-glyceroyl phosphate <=> alpha-d-glucose 1,6-bisphosphate + (2r)-3-phosphoglycerate + h(+)