Description: The eBioMC-631 (MC-631) monoclonal antibody reacts with the carbohydrate moiety galactosylgloboside on Stage-specific embryonic antigen-3 (SSEA-3). Expression is restricted to the surface of human teratocarcinoma stem cells (EC), human embryonic germ cells (EG) and human embryonic stem cells (ES) and down regulated following differentiation.