FIGURE 6:

Axonal APP vesicles colocalize with endosome markers. Immunocytochemistry of axons with (A) Rab11 and C-terminal APP Epitomics (APPE), (B) Rab5 and N-terminal A8967 (APPN), (C) Rab7 and C-terminal APP Jonas (APPJ), and (D) BACE and N-terminal APP 5a3/1g7 (APP5). Arrows indicate single-labeled APP vesicles. Arrowheads indicate double-labeled vesicles. Respective merged images are also shown. Scale bar: 5 μm. (E and F) Histogram plots of colocalization of two representative antibody pairs. Frequency of single-labeled puncta versus double-labeled puncta is plotted as a function of distribution along axon lengths.