In the absence of TCR -mediated activation , Vpr induces apoptosis whereas in its presence , Vpr interrupts the expected induction of apoptosis .
in the absence of tcr -mediated activation , vpr induces apoptosis whereas in its presence , vpr interrupts the expected induction of apoptosis .
O O O O B-protein_family_or_group O O O B-protein_molecule O B-other_name O O O O O B-protein_molecule O O O O O B-other_name O