The Type II system found in S. thermophilus, by contrast, was more restrained and precise. Canadian scientists Sylvain Moineau and Josiane Garneau, working with the Danisco team, had succeeded in trapping phage genomes from infected cells as they were being destroyed by the CRISPR immune system. In a process typical of simpler nucleases, whatever was doing the cutting in S. thermophilus operated more like a pair of scissors, clipping the DNA apart at exactly the site where the letters of the viral genome matched the letters of the CRISPR RNA.
