The MHC class II transactivator ( CIITA ) requires conserved leucine charged domains for interactions with the conserved W box promoter element .
the mhc class ii transactivator ( ciita ) requires conserved leucine charged domains for interactions with the conserved w box promoter element .
O B-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule O B-protein_molecule O O O B-amino_acid_monomer O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O