has role EC 2.7.7.7 (DNA-directed DNA polymerase) inhibitor pyridoxal pyridoxal 5'-phosphate The monophosphate ester obtained by condensation of phosphoric acid with the primary hydroxy group of pyridoxal. coenzyme methylpyridines vitamin B6 phosphate monohydroxypyridine pyridinecarbaldehyde pyridoxal 5'-phosphate(2-) mouse metabolite Saccharomyces cerevisiae metabolite Escherichia coli metabolite human metabolite