Figure 3: Primitive stem cells isolated from adult equine blood and stained with antibodies for carcinoembryonic antigen (CEA-CAM-1) and stage-specific embryonic antigen (SSEA). A. Totipotent stem cells stained with CEA-CAM-1, original magnification, 800x. White arrows denote DAB-stained spherical cells. B. Pluripotent stem cells stained with SSEA, original magnification, 200x. White arrows denote DAB stained spherical cells.

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