Comparison of gene expression frequency in Mo and Mo-derived DCs. A semilogarithmic plot shows 105 tags that were decreased more than 10-fold in DCs compared with Mo, whereas 109 tags were increased more than 10-fold in DCs compared with Mo. The relative expression of each transcript was determined by dividing the number of tags observed in Mo or DCs, as indicated. To avoid division by 0, we used a tag value of 1 for any tag that was not detectable in 1 sample. These ratios are plotted on the abscissa. The number of genes displaying each ratio is plotted on the ordinate.