Alternative (non-canonical) autophagy. (A) Rab9-dependent mitophagy is not dependent on ATG5/ATG7 and LC3, which are required for canonical autophagy, including PINK1/Parkin-mediated mitophagy. Rab9-dependent autophagy is mediated by ULK1, Rab9, Rip1, and dynamin-related protein 1 (Drp1) in the heart. (B) Endosomal pathway. Mitochondria ubiquitinated by Parkin are also eliminated by the endosome pathway. A ubiquitinated mitochondrion is captured by ESCRT complexes on the Rab5 positive early endosome and, after its maturation, the endosome fuses with the lysosome for degradation. (C) Mitochondrial-derived vesicles (MDVs). Mitochondria labeled by the PINK1/Parkin pathway are also subjected to MDVs-dependent elimination.