Adeno-associated Virus (IMAGE) University of California - Berkeley Caption The UC Berkeley team used an adeno-associated virus (AAV) to ferry genes for CRISPR-Cas9 into motor neurons to delay onset of symptoms of ALS in mice. Credit David Schaffer graphic 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.