Adhesion of LM-TK⁻ cells to immobilized VN. Adhesion of cells to VN-coated wells was performed in the absence of any competitor (−) or in the presence of uPA (100 nmol/L), suPAR (1 μg/mL), cRGD (10 μg/mL), PAI-1 (200 nmol/L), anti-avβ3 MoAb-LM609 (25 μg/mL), or control MoAb-IgG (25 μg/mL) and measured by crystal violet staining. Results are expressed as percentage of adhesion to VN without competitor (mean ± SEM of triplicate wells). Similar results were obtained in six separate experiments.