Antibodies used for Western blotting and/or immunoprecipiations were monoclonal anti-DJ1 (clone 3E8; 1:2,000; Stressgen Biotechnologies), monoclonal anti-V5 (1:5,000, Invitrogen), monoclonal anti-Tim23 (clone 32; 1:2,500; BD Biosciences), monoclonal anti--actin (clone AC-15; 1:5,000; Sigma), and polyclonal anti-VDAC (1:2,500; Abcam).