tokens: Also , the BZLF1 trans-activator protein was expressed in a few tumor cells in 6 cases , indicating entry into the lytic cycle .
folded_tokens: also , the bzlf1 trans-activator protein was expressed in a few tumor cells in 6 cases , indicating entry into the lytic cycle .
labels: O O O B-protein_molecule I-protein_molecule I-protein_molecule O O O O O B-cell_type I-cell_type O O O O O O O O B-other_name I-other_name O