KAPPA-OPIOID RECEPTOR PAb; Unconjugated Polyclonal antibody specific to Mouse, Rat κ-Opioid Receptor, internal. This antibody is validated for use in Western Blot. Anti-κ-Opioid Receptor, internal recognizes the expressed product of the OPRK1 gene. Catalog number 44302G is same antibody as former catalog number 44302. 44302G contains 50% glycerol, which improves the stability and longevity of this antibody.