Secretion of srGPIIb-IIIa by transfected SF9 insect cells. (A) Western blot analysis of secreted proteins on days 1 through 5 using a mixture of MBC 132.1 (anti-GPIIb) and rabbit anti-GPIIIa for detection. (B) Levels of srGPIIb-IIIa recovered in culture supernatants on days 1 through 5 after transfection.