Wild-type ( wt ) cells were inducible either by the tryptophan photoproduct 6-formylindolo [ 3 , 2-b ] carbazole ( FICZ ) or by UV -irradiation but very low or undetectable levels were observed in the c12 cells .
wild-type ( wt ) cells were inducible either by the tryptophan photoproduct 6-formylindolo [ 3 , 2-b ] carbazole ( ficz ) or by uv -irradiation but very low or undetectable levels were observed in the c12 cells .
B-cell_line I-cell_line I-cell_line I-cell_line I-cell_line O O O O O B-amino_acid_monomer O B-other_organic_compound I-other_organic_compound I-other_organic_compound I-other_organic_compound I-other_organic_compound I-other_organic_compound I-other_organic_compound O B-other_organic_compound O O O B-other_name O O O O O O O O O O O B-cell_type I-cell_type O