Therefore , inactivation of the IgH 3' enhancer is a multifactorial process affecting several transcription factors that control the cell-specific and developmental activity of the enhancer .
therefore , inactivation of the igh 3' enhancer is a multifactorial process affecting several transcription factors that control the cell-specific and developmental activity of the enhancer .
O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O O O B-protein_family_or_group I-protein_family_or_group O O O O O O O O O B-DNA_domain_or_region O