gland, γ-lipotropin. They noticed that the C-terminus region of this neuropeptide was similar to that of some enkephalins, suggesting that it may have a similar function to these neuropeptides. The C-terminal sequence of γ-lipotropin turned out to be the primary sequence of the β-endorphin. References External links – β-endorphin – β-endorphin (1-9) – β-endorphin (2-9) Mu-opioid receptor agonists Opioid peptides Euphoriants