Second , T cells , which lack CD45 and cannot signal via the TCR , supported higher levels of viral replication and gene expression .
second , t cells , which lack cd45 and cannot signal via the tcr , supported higher levels of viral replication and gene expression .
O O B-cell_type I-cell_type O O O B-protein_molecule O O O O O B-protein_family_or_group O O O O O O O O O O O