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Figure 1 Pulmonary epithelial cells express MMP‐1 in patients with tuberculosis. MMP‐1 immunoreactivity is brown against the blue counterstain. In uninfected lung, pulmonary epithelial cells do not express MMP‐1 (left panel). In active pulmonary TB epithelial cells adjacent to TB granulomas are strongly immunoreactive for MMP‐1 (right panel). From Elkington et al87 with permission. © The American Association of Immunologists Inc, 2005.
