The hierarchical clustergram heatmap represents relative expression levels for three groups (non treated, FFA-treated, and FFA-cotreated with SCH) on genes involved in human steatosis (genes from RT2 profiler human fatty liver PCR array including insulin signaling pathway, adipokine signaling pathway, NIDDM, metabolic pathway, inflammatory responses, apoptosis) (Fig. S3). The gene discussed is INS; the disease is type 2 diabetes mellitus.