When GFP:EV is expressed, Rab3GAPL overexpression significantly reduces ATG8CL autophagosome number (3.6, N= 16 images) compared with EV control (16.6, n= 16 images). Contrarily, when GFP:Rab8a is expressed, Rab3GAPL overexpression does not have a significant effect on ATG8CL autophagosome number (14.7, n= 16 images) compared with EV control (17.9, n= 16 images). See also Figure S4.