Fig. 8.

NG-2 (green) and CD31 (red) labeling in blood island-like structures at 7 WG in vitreous (A–D), and at 10 WG (E–H) and 12 WG (I–L) in blood vessels. Some blood island cells at 7 WG were CD31⁺/NG-2⁺ (arrow in A–D) and others were CD31⁻/NG-2⁺ (arrowhead in A–D). Blood vessels at 10 and 12 WG had CD31⁺ endothelial cells (arrow in E–H) and CD31⁻ pericytes (arrowhead in E–H) and were immunoreactive for NG-2. (Scale bar in A = 10 μm for all) (Fig. 9 from McLeod et al., Invest. Ophthalmol. Vis. Sci. 53:7923, 2012, with permission).