Figure 4. Expression of B7 in human ocular tissues

The expression of B7 in human ocular tissues was determined by IHC analysis. In the cornea, immunolabeling of B7 revealed deposits of this protein in corneal epithelial and endothelial layers. Immunolabeling also was present in lens epithelial and fiber cells, and retina. In the retina, B7 immunolabeling was prominent in rod and cone layers, and was not detectable in other retinal layers. Very low B7 expression was detected in iris and sclera. Positive immunostaining appears brown and is indicated by white arrows.