Experimental approaches (IMAGE) Hiroshima University Caption A, examples of chemically modified nucleotides used in this work shown to the right. Shown to the left are the natural nucleotide, cytosine (C) or uridine (U) before modification. B, experimental scheme. See legends to Fig. 1A-B of the original paper. Credit Katsura Asano, Hiroshima University and Kansas State University Usage Restrictions News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only. 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.