(G) The monomeric red fluorescent protein (mRFP)-green fluorescent protein (GFP) tandem protein assay revealed the induction of GOMED. Atg5 KO MEFs stably expressing tandem mRFP-GFP were incubated without (no treatment) or with CBM (2 mM) for 24 hr. Red signals indicate acidic compartments. Lysosomes were counterstained with an anti-Lamp2 antibody (cyan). Scale bars = 5 µm. Regions of interest (ROI) are indicated by dashed squares. Arrowheads indicate GOMED structure. Scale bars = 2 µm. 