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Ac-RYYRWK-NH2
Biological Activity:
Potent, selective partial agonist
peptide for the ORL1 receptor (Ki = 0.71 nM). Selective
over μ, δ and κ
opioid receptors (IC50 > 4000 nM). Increases food intake in vivo.
Dooleyet al (1997) Binding and in vitro activities of
peptides with high affinity for the nociceptin/orphanin FQ receptor, ORL1.
J.Pharmacol.Exp.Ther. 283 735. Hoet al (2000)
Characterization of the ORL1 receptor on adrenergic nerve in the rat
anococcygeus. Br.J.Pharmacol. 131 349.