Differentially expressed probe sets within the chromosome 4 QTL interval. Top panel: chromosome 4 QTL lod plot, based on reanalysis of our original data from  plus additional genotyping, using the current positions of the markers. The 95% confidence interval for the QTL is indicated by a horizontal line. The transferred region of the QTL is indicated by vertical lines. Bottom panel: The expression (E) ratios (EP.NP-EiP)/EiP of the probe sets from approximately 30 Mb to 130 Mb were aligned with the lod plot in the top panel.