e, Representative confocal micrographs of KO MEFs transfected with GFP-LC3 and wild-type mCherry-SMURF1 (WT) or mCherry-SMURF1Dgr;C2 (Dgr;C2) and treated for 4 h with CCCP. Inset, upper right, formation of completed autophagosome around a damaged mitochondrion associated with wild-type SMURF1; insets, lower right, incomplete autophagosomes or absence of LC3 signal around mitochondria associated with SMURF1Dgr;C2. See also Supplementary Figs 10 and 11 for enlarged images. 