However , analysis of sucrose gradient fractions in the gel retardation assay provided evidence that the LMP promoter -binding proteins form a complex of higher M ( r ) in EBNA-2 -positive cell extracts .
however , analysis of sucrose gradient fractions in the gel retardation assay provided evidence that the lmp promoter -binding proteins form a complex of higher m ( r ) in ebna-2 -positive cell extracts .
O O O O B-other_name I-other_name I-other_name O O B-other_name I-other_name I-other_name O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O O O O O O O O O O B-protein_molecule O O O O