Met-enkephalin, formerly known as metenkefalin, sometimes referred to as opioid growth factor (OGF), is a naturally occurring, endogenous opioid peptide that has opioid effects of a relatively short duration. It is one of the two forms of enkephalin, the other being leu-enkephalin. The enkephalins are considered to be the primary endogenous ligands of the δ-opioid receptor, due to their high potency and selectivity for the site over the other endogenous opioids. References: Dizdar N, Kagedal B, Lindvall B. Treatment of Parkinson's disease with NADH. Acta Neurol Scand. 1994 Nov;90(5):345-7. PubMed PMID: 7887134.

纯度：≥98%

CAS：58569-55-4