tokens: Furthermore , multimerized region II sequence elements enhanced the activity of a heterologous thymidine kinase promoter in monocytic cells but not other cell types tested .
folded_tokens: furthermore , multimerized region ii sequence elements enhanced the activity of a heterologous thymidine kinase promoter in monocytic cells but not other cell types tested .
labels: O O B-DNA_domain_or_region B-DNA_domain_or_region I-DNA_domain_or_region O O O O O O O B-DNA_substructure I-DNA_substructure I-DNA_substructure I-DNA_substructure O B-cell_type I-cell_type O O O O O O O