Platelet adhesion to the CH3 (top row) and OH SAMs (bottom row) preadsorbed with 0.1 mg/mL Alb, under different blocking conditions: (A,D) unblocked Alb, (B,E) platelets treated with RGDS, and (C,F) adsorbed Alb layer treated with 2,3-butanedione to neutralize Arg.