TSP2 is lacking from platelets.

Thrombin-treated PRP from wild-type mice was immobilized on glass slides and analyzed with specific anti-TSP1 and anti-TSP2 antibodies. The presence of TSP1 (A) and the absence of TSP2 (B) from platelets are shown. Both antibodies were visualized with an FITC-conjugated antirabbit IgG. The fluorescence observed in (B) is not higher than background levels. Bar represents 10 μm (A-B).