Lactose Repressor Protein (IMAGE) Rice University Caption Scientists tethered segments of lactose repressor protein and to gauge the importance of protein flexibility in forming DNA loops. Credit D. Rutkauskas & F. Vanzi Usage Restrictions Must get permission from Francesco Vanzi, University of Florence. Please email requests to: fvanzi@lens.unifi.it 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.