Quantification of TH, glutamic acid decarboxylase 65 kDa (GAD65), and COMT expression in a nares occlusion model [relative optical density (OD) U/μg total protein]. Expression of TH and GAD65 are reduced 30–40% in the OB on the side of the closed nares, reflecting activity dependence of these proteins. COMT expression is identical in open and closed nares.