The mode of ATAD3B localization. Under normal conditions (a), ATAD3B-ATAD3A hetero-oligomers are formed (cysteine-cysteine interaction may contribute to the formation of ATAD3B-ATAD3A hetero-oligomers), and ATAD3B C-terminus goes across the mitochondrial inner membrane and locates at mitochondrial intermembrane space with the support of ATAD3A; upon oxidative stress (b), ATAD3B-ATAD3A hetero-oligomers are impaired, and ATAD3B C- terminus locates at mitochondrial outer membrane for recruiting LC3. OMM (outer mitochondrial membrane), IMM (inner mitochondrial membrane). 