Analysis of the major histocompatibility complex class II gene promoter DRA has previously identified at least five cis-acting regions required for maximal expression .
analysis of the major histocompatibility complex class ii gene promoter dra has previously identified at least five cis-acting regions required for maximal expression .
O O O B-protein_complex I-protein_complex I-protein_complex I-protein_complex I-protein_complex O O B-DNA_domain_or_region O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O O O