Figure 1: (a) Immunohistochemistry staining of smooth muscle alpha actin (red) and bandeiraea simplicifolia lectin (yellow) on tissues collected from Pdgfr-GFP mouse (B6.129S4-Pdgfr). The green fluorescence represents the Pdgfr positive cells. The image shows a broad expression of the cells in the heart (a) and CFU-F enrichment strategy for the cardiac SCA-Pdgfr- cells (b). Similar localization Pdgfr-GFP is seen in skeletal muscle and lung interstitium (c, d).