Press photo, Antonio Checa (IMAGE) Karolinska Institutet Caption Antonio Checa, researcher at the Department of Medical Biochemistry and Biophysics, Karolinska Institutet. Credit Marc Mateos Usage Restrictions None 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.