Searching for the CRISPR Swiss-army Knife (1 of 2) (image) FECYT - Spanish Foundation for Science and Technology Share Print E-Mail Caption epresentation of CRISPR protein Cpf1. The class 2 CRISPR Cas complexes, including Cas9 and Cpf1, have great versatility, since a single protein guided by a guide RNA is able to recognize and cut a specific sequence of the genome. Credit Pablo Alcón / University of Copenhagen 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.