Tags: Chemical Compound, Chemical Substance.
Met-enkephalin 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.
