Figure 7
Location of small blood vessels along the margin of the ventral portion of the annulus. Small blood vessels were visualized with platelet endothelial cell adhesion molecule-1 immunohistochemistry (red localization product). (a) Modest vasculature is present in the tissues near the disc in the wild-type (WT) mouse. (b) In the thrombospondin-2-null mouse, a much larger vascular bed is present. Magnification, ×500.