To access the data, click or select the words “Appendix 27.” This will initiate the download of a pdf archive that contains the file. Frequency of occurrence of each TRE in the rat gene first intron regions was determined from the PAINT analysis as described in Methods. The y-axis indicates the frequency of each TRE among the up-regulated (blue) or down-regulated (green) gene clusters as well as among the full background gene set (black).