Nanofibers at work (VIDEO) Northwestern University This video is under embargo. Please login to access this video. Caption Nanofibers containing molecules that bear two different bioactive signals (green and orange) more effectively engage cell receptors (yellow and blue) as a result of the molecules’ fast motion. Credit Samuel I. Stupp Laboratory/Mark Seniw/Northwestern University Usage Restrictions Credit Northwestern License Original 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.