Quantitation of differentially expressed proteins in pancreatic cancer by ELISA. ELISA was performed using human ApoA-IV ELISA kit vitamin D binding protein ELISA kit and RBP4 ELISA kit, in serum samples obtained from 15 patients with pancreatic cancers and 15 control subjects. Analysis was performed by using Wilcoxon Mann-Whitney test. Closed circles indicate control and closed squares indicate cancer. (a): ApoA-IV levels of serum of patient with pancreatic cancer group ( AU) were lower than those in healthy group ( AU, ); (b): GC levels were significantly lower in the patient group with pancreatic cancer ( UA) when compared with healthy group ( AU, ); (c): RBP4 levels were lower in the pancreatic cancer group ( AU) than healthy group ( AU, .