Expression analysis of TR4 target genes. Box-and-whisker diagrams show the range of expression values of TR4 bound genes in HeLa and HepG2 cells in comparison to expression values of all genes present on the HepG2 expression array and to the set of 3000 randomly selected genes. Expression values are plotted on the y axis. The central line in the box-and-whisker plots shows the position of the median, the upper and lower boundaries of the box represent the location of the upper (75th percentile) and the lower (25th percentile) quartiles, respectively. Data outliers are not shown.