Gel shift assays demonstrated SP1 and Egr-1 binding to the CD19 GC box , while unknown nuclear proteins bound the PyG and AT boxes .
gel shift assays demonstrated sp1 and egr-1 binding to the cd19 gc box , while unknown nuclear proteins bound the pyg and at boxes .
O O O O O O B-protein_molecule O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O O O O O O O O O