Cancer cells proliferation (IMAGE) Scripps Research Institute Caption Researchers discovered that when the protein DNMT3B becomes S-nitrosylated in the presence of nitric oxide (NO), cancer-related genes become activated, leading to the proliferation of tumor cells. Credit Scripps Research Usage Restrictions With related coverage and credit License Original 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.