Figure 7From: The microenvironment determines the breast cancer cells' phenotype: organization of MCF7 cells in 3D cultures Presence of lumen in epithelial structures in mixed Matrigel™-collagen gels. Representative confocal image taken from a whole-mounted gel stained with Carmine-alum of MCF7 cells in co-culture with RMF after 3 weeks in culture. Arrow signals lumen containing some apoptotic cells. Scale bar: 50 μm.Back to article page