CXADR (coxsackie and adenovirus receptor), also known as CAR, is a type I transmembrane glycoprotein of the CTX family of the Ig superfamily. CXADR has received attention as a receptor that facilitates gene transfer mediated by most adenoviruses. It is also an adhesion molecule within junctional complexes, notably between epithelial cells lining body cavities and within myocardial intercalated discs.