(IMAGE) Institute of Science and Technology Austria Caption Structure of the poxviral core protein A10. The three subunits of the trimer (colored differently) are represented as simulated cryo-EM surfaces. The cryo-EM surface is increasingly more visible with each subunit. Credit © Jesse Hansen Usage Restrictions Free to use when reporting on paper. 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.