Proteins on DNA (IMAGE) University of Washington Caption This is an artist's depiction of two ARF proteins interacting with one another as they bind to DNA and switch on expression of a target gene. Credit Jake Wegesin Usage Restrictions Must include 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.