Changes in the pattern of expression of genes involved in ECM proteolysis (MMP-9, MT1-MMP, RECK) induced by HU, and their reversibility. Gene expression analyzed by in situ hybridization for MT1-MMP and MMP9 and immunohistochemistry for RECK. Description as in legend of Figure 2. N.B. one micrograph is missing from the panel due unsuitable photographic quality of the sections. The experimental data is available and was readable by direct microscopic inspection.