Initial signaling through the CD4 receptor played a major role in the sensitization of HIV-infected T cells to undergo apoptosis .
initial signaling through the cd4 receptor played a major role in the sensitization of hiv-infected t cells to undergo apoptosis .
O O O O B-protein_molecule O O O O O O O O O B-cell_type I-cell_type I-cell_type O O B-other_name O