We have examined the effect of Rb expression on the activation of the promoter for HLA-DRA , the prototype class II gene .
we have examined the effect of rb expression on the activation of the promoter for hla-dra , the prototype class ii gene .
O O O O O O B-protein_molecule O O O O O O O O B-DNA_domain_or_region O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O