Although specific binding sites have been difficult to localize by chemical or enzymatic footprinting procedures , NF-muNR binding sites are critical for efficient MAR-BP1 binding .
although specific binding sites have been difficult to localize by chemical or enzymatic footprinting procedures , nf-munr binding sites are critical for efficient mar-bp1 binding .
O O O O O O O O O O O O B-other_name I-other_name I-other_name O B-protein_molecule O O O O O O B-protein_molecule O O