Fig. 4.
Association of p85 with GP Ib.
(A) One milliliter cytosol, actin cytoskeletal (actin CSK), or membrane cytoskeletal (membrane CSK) platelet subcellular fractions from thrombin-stimulated platelets (2 × 109/mL platelets) or (B) vWF- and botrocetin-stimulated platelets were immunoprecipitated using 5 μL anti-glycocalicin antibody or nonimmune sera (Non I) (5 μL) and immunoblotted using antibody to the p85 subunit of PI 3-kinase. This figure is representative of 4 similar experiments.