To further evaluate the role of X box DNA-binding proteins in class II gene expression , the role of the X box region was examined in both class II-positive and -negative lymphoid cells .
to further evaluate the role of x box dna-binding proteins in class ii gene expression , the role of the x box region was examined in both class ii-positive and -negative lymphoid cells .
O O O O O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O B-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O B-cell_line I-cell_line O B-cell_line I-cell_line I-cell_line O