Biochem/physiol Actions Pyridoxamine-5′-phosphate (PMP) may be used as a substrate to characterize pyridoxine-5′-phosphate oxidase(s) and pyridoxamine-phosphate transaminase(s) from various species and tissues. Other Notes Tandem Mass Spectrometry data independently generated by Scripps Center for Metabolomics is available to view or download in PDF. 82890.pdf Tested metabolites are featured on Scripps Center for Metabolomics METLIN Metabolite Database. To learn more, visit sigma.com/metlin.