Phylogenetic analysis of mitovirus RdRp (IMAGE) Hokkaido University Caption Phylogenetic analysis of the RNA-dependent RNA polymerase enzyme sequence shows that large duamitoviruses are the most ancestral group of mitoviruses (Tatsuhiro Ezawa). Credit Tatsuhiro Ezawa Usage Restrictions This image is copyrighted but may be used to report on this press release if credited as instructed. 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.