The activity of constructs containing 5' deletion mutants of the alpha 4 gene promoter was compared in transfection assays into cell lines that express alpha 4 and cell lines that do not .
the activity of constructs containing 5' deletion mutants of the alpha 4 gene promoter was compared in transfection assays into cell lines that express alpha 4 and cell lines that do not .
O O O O O B-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group O O B-protein_molecule I-protein_molecule O O O O O B-other_name I-other_name O B-cell_line I-cell_line O O B-protein_molecule I-protein_molecule O B-cell_line I-cell_line O O O O