SOX9 and familial pancreatic carcinoma: Twelve PCR-amplified cDNA libraries from four groups of samples were obtained: PANC-1 and COLO357 pancreatic cancer cell lines with siRNA-suppressed SOX9 gene expression (PANC-1–siSOX9, COLO357–siSOX9), and corresponding control cells transfected with neutral siRNA (PANC-1–siNEG, COLO357–siNEG), with three biological repeats for each group.