Graphical explanation of ET-seq and DART (IMAGE) University of California - Berkeley Caption To successfully edit genes within multiple members of a microbial community, UC Berkeley scientists had to develop two new methods: Environmental Transformation Sequencing (ET-Seq), top, which allowed them to assess the editability of specific microbes; and DNA-editing all-in-one RNA-guided CRISPR-Cas transposase (DART), which allowed highly specific targeted DNA insertion into a location in the genome defined by a guide RNA. The DART system is barcoded and compatible with ET-Seq so that, when used together, scientists can insert, track and assess insertion efficiency and specificity. Credit Jill Banfield lab, UC Berkeley Usage Restrictions none 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.