were detected in moderate amounts on PCL surfaces, and β chain (70 kDa) and activation fragment (42 kDa) appeared in very strong intensities. As C3 also serves as a ligand opsonin, facilitating phagocytosis, its presence suggests that surfaces may be responsive to phagocytosis and other ligand-mediated mechanisms . For UTX plasma, aone or two-step decrease in the intensities of whole C3 (50%), β chain (10%), and activation fragment (11%) was observed.