Unidirectional Stretching of Cells (IMAGE) University of California - San Diego Caption UCSD bioengineers have found a link between parallel alignment of 'stress fibers' in blood vessel cells and healthy levels in those cells of a protein called JNK. Credit UCSD Jacobs School of Engineering Usage Restrictions Nonprofit organizations are permitted to use the photo with credit: UCSD Jacobs School of Engineering 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.