I am looking for a tool/web-service to compare two sets of cell lines, e. g. one that is resistant and the other being sensitive. I want to know whether there are mutations or alterations in expression levels that are common or at least more frequent in either the first or the second group of cell lines. So far I found http://cellexpress.cgm.ntu.edu.tw/ where one can compare groups. The heatmaps I got by the "Gene Signature Explore" function look promising. However, I can't find which genes are significantly differently expressed between the two groups. Do you have any ideas which tool or web-service can provide the differences of two sets of cell lines?