Detect Opioid Receptor using this rabbit polyclonal antibody, Anti-Mu Opioid Receptor Antibody validated for use in western blotting & IHC (Paraffin).', 'Immunohistochemistry Analysis: A 1:1,000-4,000 dilution from a representative lot detected Mu Opioid Receptor in human cerebellum, mouse hippocampus, mouse midbrain, and r at midbrain tissue.