Fig. 1.
CD34+/CD86+ cells can present tetanus toxoid antigen to autologous CD4+ T cells. APC were irradiated (3,000 cGy) and cultured with purified autologous CD4+ T cells in either media alone or in the presence of 1 μg/mL tetanus toxoid. Proliferation was measured on day 5 after 18 hours of labeling with 3H-thymidine.