Glyceraldehyde-3-Phosphate Dehydrogenase (GAPDH) is an enzyme that plays a crucial role in the glycolysis metabolic pathway. It catalyzes the conversion of glyceraldehyde-3-phosphate into 1,3-bisphosphoglycerate, a key step that helps produce energy in the form of ATP. GAPDH is found in nearly all living organisms and is essential for cellular respiration. Beyond its role in energy production, it is also involved in various cellular processes, including apoptosis and DNA repair, highlighting its importance in maintaining cellular health and function.