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Effect of vaginal distention on protease activity in the vaginal wall of nonpregnant animals. A: gelatin zymograms of vaginal homogenates (5 μg per lane) from nonpregnant wild-type mice 24 or 48 h after distention or sham operation. B: quantification of MMP-2 and MMP-9 enzyme activity (sham, n = 6; distended, n = 6). *P ≤ 0.05 compared with sham.
