Amino Acid Sequence Tyr-Pro-Phe-Phe-NH2 Biochem/physiol Actions Potent, selective endogenous μ opioid receptor agonist. Legal Information Sold under license to US patent number 6,303,578 Other Notes Tandem Mass Spectrometry data independently generated by Scripps Center for Metabolomics is available to view or download in PDF. E3148.pdf Tested metabolites are featured on Scripps Center for Metabolomics METLIN Metabolite Database. To learn more, visit sigma.com/metlin. |