Figure 3. CNS-1 cells (200,000 cells per well) were exposed for 24 hours to increasing concentrations per well of either resiquimod (A), or CY (B). Viability was measured (in triplicate) in a standard (3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium (MTT) bromide assay, and was expressed as a percentage of viability measured for cells cultured in medium only (control). Representative data of two experiments are shown.