B Representative confocal images of a dendrite (top) and an axon (bottom) in which mitochondrial translation products were labeled with HPG (magenta). HOMER1 and VGLUT1 were used as post- and presynapse markers, respectively (green) and DiO stained randomly neurites (gray). In each neurite, an exemplary region was selected and the DiO was outlined to mark the outer edge of the region. As a control, cells were treated with Chloramphenicol (Chl) to inhibit mitochondrial translation. Scale bars, 5 µm. 