Schematic representation of the central metabolism (predicted citric acid cycle and anaplerotic reactions) of Helicobacter bizzozeronii CIII-1. In red the reactions predicted to be present in H. bizzozeronii CIII-1 but not in H. pylori. In black the reactions predicted to be in common in both Helicobacter species. Reaction for which no predictable enzymes were found in the genome is indicated by dotted line. The H. bizzozeronii gene numbers are indicated in boxes.