Cas9 specifies functional viral targets during CRISPR-Cas adaptation. Heler R*, Samai P*, Modell JW, Weiner C, Goldberg GW, Bikard D, Marraffini LA. (2015) Cas9 specifies functional viral targets during CRISPR-Cas adaptation. Nature. 519(7542):199-202. [ link ] [ pdf ] Researchers Joshua Modell Associate Professor