Figure 3. Expression profiles of limbal stromal (LS) at passage 6 and corneal stromal (CS) cells at passage 4 by FACS analysis. The two populations of cells have very similar expression where they expressed mesenchymal markers and absence of hematopoietic markers and endothelial marker (CD31). The cells did not express ABCG2 and other embryonic stem cells markers. The green line in the histograms represents the isotype controls.