Question: One step in the gluconeogenesis pathway for the biosynthesis of glucose is the partial reduction of 3-phosphoglycerate to give glyceraldehydes 3-phosphate. The process occurs by

One step in the gluconeogenesis pathway for the biosynthesis of glucose is the partial reduction of 3-phosphoglycerate to give glyceraldehydes 3-phosphate. The process occurs by phosphorylation with ATP to give 1, 3-bisphospho- glycerate, reaction with a thiol group on the enzyme to give an enzyme hound thioester, and reduction with NADH. Suggest mechanisms for all threereactions.

LOPO3- Enz-SH S-Enz PO, ATP ADP - H-C-OH - CH2OPO,2- CH2OPO,2- CH2OPO32-

LOPO3- Enz-SH S-Enz PO, ATP ADP - H-C-OH - CH2OPO,2- CH2OPO,2- CH2OPO32- (Enzyme-bound thioester) 3-Phosphoglycerate 1,3-Bisphosphoglycerate NADH/H* NAD*, Enz-SH Glyceraldehyde 3-phosphate -- H2OPO3?-

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