Dynorphin A1–8 is a truncated form of dynorphin A with the amino acid sequence: Tyr-Gly-Gly-Phe-Leu-Arg-Arg-Ile.[3][4] Dynorphin A1–8 is an agonist at the mu-, kappa-, and delta-opioid receptors;[4] it has the highest binding affinity for the kappa-opioid receptor.[4] Structures of dynorphin A bound to the κ-opioid receptor have been reported.[2][5]
^"Dynorphin A 1-8". HMDB Version 4.0. Human Metabolome Database. 27 September 2017. Retrieved 20 October 2017.
^ abc"Dynorphin A-(1-8): Biological activity". IUPHAR/BPS Guide to PHARMACOLOGY. International Union of Basic and Clinical Pharmacology. Retrieved 20 October 2017. Principal endogenous agonists at κ receptor