G Six-week-old C57BL/6N male mice were intravitreally injected with Sema3C-Fc (right eye) or control IgG-Fc (left eye), and retinae were collected 2 days later. The retinal vessel network was examined with CD31immunostaining. Scale bar, 100 μm (upper panel) and 20 μm (lower panel). Representative images of four retinae per group. 