Virus Proteins in the Matryoshka Design (IMAGE) University of Veterinary Medicine -- Vienna Caption Like the Matryoshka doll, the NS3 protein can generate smaller fractions of itself. Credit Frauke Lejeune / Vetmeduni Vienna 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.