Irreversible steps of Glycolysis are catalyzed by:
Hexokinase, Phospho Glycerate Kinase, Pyruvate Kinase Pyruvate Kinase, Fructose 1,6 Bisphosphatase, Phosphofructokinase Hexokinase,  Phosphofructokinase,  Pyruvate Kinase Glucokinase, Pyruvate Kinase, Glyceraldehyde 3 Phosphate Dehydrogenase