CRISPR Immunological Memory (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Bacteria and archaea "remember" viral infections by inserting short spacer sequences (toe-tagged) of genetic information stolen from the invader between repeat elements (gray) of the host's genomic CRISPR loci. Credit Graphic by Megan Riel-Mehan 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.