Pyridoxal phosphate is an organic compound formed by the combination of vitamin B6 and phosphoric acid, including pyridoxal, pyridoxamine, and pyridoxine, which exist in the form of phosphate esters in the body. Among them, pyridoxal phosphate and pyridoxamine phosphate can be converted into each other, and they are all active types. Pyridoxal phosphate is the active form of vitamin B6. Several reactions catalyzed by pyridoxal phosphate are: transamination, α-decarboxylation, β-decarboxylation, β-elimination, γ-elimination, racemization and aldol reaction.
