Molecule EC23 (IMAGE) Durham University Caption Dr. Stefan Przyborski, Durham University, with the molecule EC23, in a laboratory setting. Credit North News and Pictures/Durham University Usage Restrictions Please credit North News and Pictures/Durham University 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.