The frequencies of CD8 ( + ) T cells directed against IE-1 were similar to those directed against pp65 in donors tested with known pp65 -derived peptides .
the frequencies of cd8 ( + ) t cells directed against ie-1 were similar to those directed against pp65 in donors tested with known pp65 -derived peptides .
O O O B-cell_type I-cell_type I-cell_type I-cell_type I-cell_type I-cell_type O O B-protein_molecule O O O O O O B-protein_molecule O O O O O B-protein_molecule O O O