Cell-surface phenotype and Oct4 protein expression of mouse and rat clones evaluated by flow cytometry. (a) Flow cytometry results for mouse clones. From left to right: MSCs; mMAPC-1; mMAPC-2; mClone-3; and MSCs cultured in MAPC conditions. The histogram in each panel plots the number of cells (as a percentage of the maximum) on the vertical axis against the fluorescence intensity of the labeled antibody bound to the indicated protein (horizontal axis). The horizontal line on each histogram indicates the fluorescence range that contains the indicated percentage of cells positive for that protein. (b) Flow cytometry results for the rat clones rMAPC-1 and rClone-2.