Description: Peptide to [Cys8, 13]-Dynorphin A (1-13) amide Form: Lyophilized powder Molecular Formula : C69H112N24O14S2Molecular Weight : 1565.94Purity : > 95%Chemical Structure : Tyr-Gly-Gly-Phe-Leu-Arg-Arg-Cys-Arg-Pro-Lys-Leu-Cys-NH2 (Disulfide bridge Cys8-Cys13)Application : This cyclic disulfide-containing dynorphin A analog displays high kappa-potency and selectivity at the peripheral (guinea pig ileum) but not at the central (guinea pig brain) kappa-opioid receptor.Storage/Stability : Shipped at 4°C. Store at -20°C for one year.