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Comparison of apical fluid heights. A: images of fluid heights in WT, uPA−/−, and deficient cells treated with proteases for 6 h (uPA+plasmin, PuP). Bar, 10 μm. B: measurements of apical fluid heights. N = 5–8. *P < 0.05 vs. WT and &P < 0.05 vs. uPA−/− cells.
