Figure 2. Triple immunofluorescence staining for tenascin-C, α- smooth muscle actin (SMA; marker for vascular smooth muscle cells), CD34 (marker for vascular endothelial cells), glial fibrillary acidic protein (GFAP; marker for glial cells), and integrin α_V in fibrovascular membranes (FVMs) from eyes with proliferative diabetic retinopathy (PDR) patients. Nuclei are stained blue. Scale bar, 100 μm.