tokens: In the first approach , stable clones of two B-cell lines carrying an LMP1 gene under the control of an inducible metallothionein promoter were induced to express LMP1 in all cells .
folded_tokens: in the first approach , stable clones of two b-cell lines carrying an lmp1 gene under the control of an inducible metallothionein promoter were induced to express lmp1 in all cells .
labels: O O O O O O O O O B-cell_line I-cell_line O O B-protein_molecule O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O O B-protein_molecule O O O O