Gly-Gly-Phe-Met-Thr-Ser-Glu-Lys-Ser-Gln-Thr-Pro-Leu-Val-Thr-Leu

[Des-Tyr1]-gamma-Endorphin is a neuropeptide, which can be found in human cerebrospinal fluid. [Des-Tyr1]-gamma-Endorphin exhibits antidepressant efficacy, facilitates the extinction of active avoidance and attenuates the passive avoidance behavior in rats[1].

[1] Manchanda R, et al., (Des‐tyr1)‐gamma‐endorphin (DTγE) in the treatment of depression: Double‐blind placebo‐controlled trial[J]. Human Psychopharmacology: Clinical and Experimental, 1986, 1(2): 99-102.