not detected. Foxp3+ T cells induced by Btn2a2 ligation are practical regulatory T cells To be able to show how the Btn2a2-Fc induced CD4+CD25+Foxp3+ cells are functional, regulatory T cells, we sorted for CD4+CD25+Foxp3+ T cells (Btn2a2-induced Foxp3+ T cells) and incubated them with nonactivated CD3+CD25?Foxp3? T cells, stained with cell proliferation dye, at a … Continue reading not detected