In a fourth cell line , A1-VDR , the receptor for 1 , 25 ( OH ) 2D3 had a low binding capacity and 25 ( OH ) D3-24-hydroxylase activity was not detectable .
in a fourth cell line , a1-vdr , the receptor for 1 , 25 ( oh ) 2d3 had a low binding capacity and 25 ( oh ) d3-24-hydroxylase activity was not detectable .
O O O B-cell_line I-cell_line O B-cell_line O O O O B-lipid I-lipid I-lipid I-lipid I-lipid I-lipid I-lipid O O O O O O B-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule O O O O O