(a-f) Representative EM of WT (a), ATG5−/− (b), Ulk1gt/gt (c,d) and DKO (e,f) reticulocytes from embryonic liver (E14.5). (a,b) Mitophagy was detected in WT and ATG5−/− cells (scale bar, 1 μm). Insets indicate mitophagy (scale bar, 0.2 μm). (c,e) In Ulk1gt/gt and DKO cells, numerous mitochondria were in contact with membrane structures (scale bar, 1 μm). Enlarged images are shown on the right side (scale bar, 0.2 μm). (d,f) Some Ulk1gt/gt and DKO cells showed plasma membrane blebs containing mitochondria (scale bar, 1 μm). (g,h) Quantitative analysis of mitophagy calculated from EM photos in the embryonic liver at E18.5. Population of reticulocytes with mitophagy (g), and number of mitochondria per reticulocytes (h) were calculated (n>35 cells per mouse). The data are shown as mean±s.d. (n=3). *P0.05 versus value of WT (analysis of variance (ANOVA)); #P0.05 versus value of Atg5−/− (ANOVA); 'NS' indicates not significant versus value of WT (ANOVA). 