Fig. 3.
Persistence of the physical integrity of the endothelial layer after A23187 treatment.
Cryostat sections of untreated (A) or A23187-treated mesenteric venules (B) were incubated with a mAb directed against PECAM-1. The activated venules were collected 1 minute after A23187 treatment (peak of platelet adhesion). Immunoreactivity for PECAM-1 was not affected byA23187. Asterisk indicates vessel lumen. Bar, 10 μm.