Expression of Xg and the 12E7 antigen in primates

Tests on cells from various non-human primates showed that expression of the 12E7 antigen is the same on cultured fibroblasts, peripheral blood lymphocytes and red blood cells. No quantitative polymorphism of 12E7 expression was observed in any of the animals tested. Tests on red blood cells of these primates confirm that anti-Xga and the monoclonal antibody 12E7 define different determinants.