Good Fences Make Good Neighbors (1 of 2) (image) Salk Institute Share Print E-Mail Caption This photo shows CTCF and Tumor Suppressor Gene Silencing. Credit Image: Courtesy of Michael Witcher, Salk Institute for Biological Studies Usage Restrictions News media reproduction to illustrate this story permitted with proper attribution as provided above. For one time 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.