Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|Y (what is YN ?)|
Dynorphin A is a dynorphin, an endogenous opioid peptide with the amino acid sequence: Tyr-Gly-Gly-Phe-Leu-Arg-Arg-Ile-Arg-Pro-Lys-Leu-Lys.
Dynorphin A1–8 is a truncated form of dynorphin A with the amino acid sequence: Tyr-Gly-Gly-Phe-Leu-Arg-Arg-Ile. Dynorphin A1–8 is an agonist at the mu-, kappa-, and delta-opioid receptors; it has the highest binding affinity for the kappa-opioid receptor.
Principal endogenous agonists at κ receptor