Expression of SOX9 and β-catenin in colorectal cancers. Semi-quantitative RT-PCR shows SOX9 and β-catenin expression in colorectal cancer tissues (Left) and cell lines (Right). Representative names of each sample or cell line are listed under the figure. T stands for cancer tissue and N for matched normal colonic mucosa. GAPDH is used as the normalization control and given at the bottom of the figure. Up-regulation of SOX9 and β-catenin is present in case 1, 2, 3, 4 and 6, and down-regulation only in 5. All cell lines have the expression of both genes.