Western blotting of trigeminal ganglion (Tg), epididymis (Epi), and skeletal muscle (Mu) using monoclonal antibodies for caveolin-1 (Cav-1) and -3 (Cav-3). In the trigeminal ganglion and epididymis, two bands for Cav-1 are detected at 24 kDa and 21 kDa, which recognizes the α- and β-isoforms of the protein. The Cav-3 immunoreaction, which is found in a single band around 18 kDa, is detected in skeletal muscle but not in the trigeminal ganglion.