This locus encodes a transcriptional trans-activator required for the constitutive expression of major histocompatibility complex ( MHC ) class II genes .
this locus encodes a transcriptional trans-activator required for the constitutive expression of major histocompatibility complex ( mhc ) class ii genes .
O O O O O O O O O B-other_name I-other_name O B-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group O