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Fig. 10. Aggregate formation and compaction of CHO-A5 cells in the presence of RGD peptide. CHO-A5 cells secrete low levels of endogenous FN. Culturing these cells in FN-depleted medium resulted in formation of cellular sheets (A). With the addition of 100 µM RGD peptide CHO-A5 cells failed to form aggregates (B). Bar, 1.0 mm.