Chemical Key (IMAGE) University of California - Berkeley Caption The researchers used the chemical benzothiazole as a molecular key to activate essential genes in bacteria. The red highlights the areas targeted for mutation. The method demonstrates a cheap, easy technique that could be used for the biocontainment of genetically modified organisms. Credit Courtesy of Gabriel Lopez, UC Berkeley Usage Restrictions Non-commercial use only. 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.