all samples. Unsupervised two-way hierarchical clustering of differentially expressed genes was analyzed with The Institute for Genomic Research Multiexperiments Viewer (MEV) v4.5.1 [13], which used complete linkage and Euclidean distance metric to generate the hierarchical tree. High expressions relative to mean are colored red, whereas low expressions are colored green. Black represents no significant change in expression level between mean and sample. All cell line correlations were a measure of Pearson's rho implemented in Statistical Analysis System (SAS).
