tokens: A similar infection with a recombinant retrovirus containing the beta-galactosidase gene with an adenovirus E2 promoter , results in beta-galactosidase activity in a limited number of cultured and primary cells .
folded_tokens: a similar infection with a recombinant retrovirus containing the beta-galactosidase gene with an adenovirus e2 promoter , results in beta-galactosidase activity in a limited number of cultured and primary cells .
labels: O O O O O B-other_artificial_source I-other_artificial_source O O B-protein_molecule O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O B-protein_molecule O O O O O O B-cell_line O B-cell_type I-cell_type O