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Immunostaining indicates fibronectin adsorbed only to micropatterned islands: (a) 6-μm-diameter circular islands; (b) 10-μm-outer, 8-μm-inner-diameter annulus islands; (c) 10-μm-diameter circular islands; (d) 25-μm-outer, 23-μm-inner-diameter annulus islands; and (e) 25-μm-diameter circular islands (bars = 50 μm).
