To establish a putative relationship between DCIR expression and apoptosis induced by free radicals after HIV-1 infection, we performed a double staining with anti-DCIR and FITC-VAD-FMK in virus-infected CD4+ T cells treated with catalase because this enzyme is a known scavenger of ROS (including hydrogen peroxide). The gene discussed is CLEC4A; the disease is HIV-1 infection.