TEM images of platelet aggregates.

Representative TEM images of denuded carotid artery subendothelium 10 minutes following injury. A large platelet aggregate with several layers of intimately associated platelets can be seen in wild-type mice (A). A glancing section of the internal elastic lamina is seen as a white band. In contrast, a small aggregate of platelets displaying minimal interactions can be seen in TSP2-null mice (B). A total of 5 mice per genotype was analyzed. Bar represents 1 μm.