The editor PPR56, (IMAGE) University of Bonn Caption which only acts in mitochondria in the moss, edits more than 900 different positions in nuclear transcripts in human cells. The size of the respective nucleotide (A, U, C, G) shows how often it occurs at this position of the targets additionally edited by PPR56 in the human transcripts. Credit Image: Elena Lesch/University of Bonn Usage Restrictions This image may be used together with the press release. 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.