Serum Helicobacter pylori KatA and AhpC antibodies as novel biomarkers for gastric cancer

Figure 1 SDS-PAGE analysis of purified recombinant proteins. A: KatA; B: AhpC. 1: Marker; 2: Unpurified protein; 3: Purified protein. KatA: Catalase; AhpC: Alkyl hydroperoxide reductase.

Figure 2 Receiver operating characteristic curve for serum catalase antibody. A: All subjects; B: H. pylori-positive subjects; C: H. pylori-negative subjects. H. pylori: Helicobacter pylori.

Figure 3 Receiver operating characteristic curve for serum alkyl hydroperoxide reductase antibody. A: All subjects; B: H. pylori-positive subjects; C: H. pylori-negative subjects. H. pylori: Helicobacter pylori.

Figure 4 Receiver operating characteristic curve for combined analysis in all subjects. A: KatA + FlaA; B: KatA + FlaA + AhpC. KatA: Catalase; AhpC: Alkyl hydroperoxide reductase; FlaA: Flagella protein A.