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Cell velocity versus E-cadherin density on mixed E-cadherin–fibronectin substrata. In these protein films, the fibronectin was fixed at 40 molecules/µm2 (filled circles) and 1100 molecules/µm2 (open triangles) and the E-cadherin varied. The data are for 231-Tet cells treated with 1 µg/ml doxycycline.
