SSEA3

SSEA3 (stage-specific mouse embryonic antigen) is a cell-surface protein involved in cell differentiation. Cell surface antigens are powerful tools for characterizing the function and expression of developmentally regulated cells during both embryogenesis and oncogenesis.

The SSEA3 protein is present on the surface of human teratocarcinoma cells, embryonic germ cells, and embryonic stem cells but not mouse undifferentiated mouse cells of these types.