Protective shell (IMAGE) Institute of Science and Technology Austria Caption The so-called capsid protects the genetic information of a virus and is far more flexible than previously thought. Its proteins are organized in hexamers (grey) and pentamers (orange). Credit Martin Obr, IST Austria Usage Restrictions Martin Obr, IST Austria 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.