Addition of TPA causes an otherwise ineffective dose of 1 , 25-dihydroxy vitamin D3 to induce differentiation .
addition of tpa causes an otherwise ineffective dose of 1 , 25-dihydroxy vitamin d3 to induce differentiation .
O O B-other_organic_compound O O O O O O B-lipid I-lipid I-lipid I-lipid I-lipid O O O O