Substrate

-level phosphorylation Substrate-level phosphorylation is a biochemical reaction in which energy from a metabolic pathway is used to directly transfer a phosphate group from a compound called phosphoenolpyruvate (PEP) to ADP, forming ATP. This type of phosphorylation is important for the generation of ATP, a molecule which provides energy to cells. Substrate-level phosphorylation is used in metabolic pathways such as glycolysis and the Krebs cycle to generate the energy required for cellular processes. By understanding how substrate-level phosphorylation works, researchers can develop strategies to improve metabolic efficiency and produce energy more efficiently.