Bacterial toxin binding to DNA in the gut (IMAGE) Cancer Research UK Caption Illustration of bacterial toxin colibactin binding to a specific DNA sequence. Genetic fingerprints have implicated colibactin in a subset of bowel cancers. Credit DEMCON | nymus3D, ©Hubrecht Institute. Usage Restrictions With credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.