Figure 3From: Validation of putative reference genes for gene expression studies in human hepatocellular carcinoma using real-time quantitative RT-PCR Expression levels of 6 putative reference genes in different sample panels. Average copy number of each gene in 20 ng of purified RNA samples was transferred on a base-10 logarithmic scale. An approximately 10,000-fold expression difference is apparent between the most abundant (B2M) and the rarest (UBC) transcript.Back to article page