Princeton Researchers Show How Junk DNA Activates Genes (2 of 2) (image) Princeton University Share Print E-Mail Caption Using an imaging technique developed at Princeton, researchers captured the moment when a segment of DNA -- from genetic material that was once thought to be useless junk -- turns on a target gene. Here, a time series of images reveals how a DNA segment known as an enhancer can turn on, or activate, its target gene. The enhancer (blue) must come in close proximity to the gene (green) to turn on gene activity (pink). Credit Hongtao Chen, Princeton University Usage Restrictions Editorial use only Share Print E-Mail 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.