tokens: To characterize further the function of the intracellular vitamin D receptor ( VDR ) , we have developed stable transfectant variants of a vitamin D-responsive cell line ( U937 ) which express either decreased or increased numbers of VDR .
folded_tokens: to characterize further the function of the intracellular vitamin d receptor ( vdr ) , we have developed stable transfectant variants of a vitamin d-responsive cell line ( u937 ) which express either decreased or increased numbers of vdr .
labels: O O O O O O O B-protein_molecule B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O B-protein_molecule O O O O O B-cell_line I-cell_line I-cell_line O O B-cell_line I-cell_line I-cell_line I-cell_line O B-cell_line O O O O O O O O O B-protein_family_or_group O