Expression of lipid metabolism genes in human and mouse liver tissue. A. Comparison of gene expression levels of lipid metabolism genes by either A. Microarray analysis or B. Real-time PCR analysis using either human (solid bars) or mouse (dotted bars)-specific probes. Data is shown as log10 ratio and reflects the difference in expression between donor-matched HCV-infected and naïve liver tissue. Donor-matched samples contained approximately the same percentage of human tissue. The three HCV-infected mice were transplanted with hepatocytes from different donors.