Activation of the HIV-1 enhancer by the LEF-1 HMG protein on nucleosome-assembled DNA in vitro .
activation of the hiv-1 enhancer by the lef-1 hmg protein on nucleosome-assembled dna in vitro .
O O O B-DNA_domain_or_region I-DNA_domain_or_region O O B-protein_molecule I-protein_molecule I-protein_molecule O B-DNA_family_or_group I-DNA_family_or_group O O O