CRISPR/Cas9 (image) University of California - San Diego Share Print E-Mail Caption The conventional CRISPR-Cas9 system comprises two parts: the Cas9 enzyme, which acts like a wrench, and specific RNA guides (CRISPRs), which act as different socket heads. These RNAs guide the Cas9 protein to the target gene on a DNA strand. This technique allows researchers to study genes in a specific, targeted way. Credit Ernesto del Aguila III, NHGRI Usage Restrictions None Share Print E-Mail 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.