Figure 4: Immunofluorescence assays of cellularized (A) and decellularized (B and C) heart matrices. As depicted, decellularized matrices preserve important ECM components, such as Collagen I (red) and Laminin (green). The pannel also shows the absence of cell nuclei in DM, in contrast to cellularized organs, as shown by Hoechst staining (blue). Scale bars: 100 μm.