Figure 1: The presence of s-CCNL2-Abs in patients with esophageal SCC. E.coli containing CCNL2 cDNA plasmid was treated with (+) or without (-) IPTG for 2.5 h, and the total cell lysate was subjected to Western blot analysis using sera of esophageal cancer patient T1 and T23. Arrows indicate the IPTG-dependent specific bands, which represent CCNL2 cDNA products.