C HeLa cells expressing various GFP-parkin mutant contructs (green), pOCT-DsRed2 (red) and CFP-Drp1K38E were treated with 50 µM antimycin A for 2 h, then fixed and immunostained against TOM20. Arrows indicate matrix-positive/TOM20-negative structures colocalizing with GFP-parkin. Scale bars, 30 µm. 