RCas9 (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption This schematic shows how RNA-guided Cas9 working with PAMmer can target ssRNA for programmable, sequence-specific cleavage. Credit Jennifer Doudna laboratory at UC Berkeley 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.