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Luciferase assay on HSV-1 ICP0 and ICP27 promoters in U-2 OS (human osteosarcoma) cells in the presence of the G4 ligand B19 (2.5–20 µM). Cell viability, determined by MTT (3-(4,5-dimethylthiazolyl-2)-2,5-diphenyltetrazolium bromide) assay, in the presence of B19 is also indicated.
