http://i1.wp.com/www.artofthecell.com/wp-content/uploads/2014/06/Art-of-the-Cell-CRISPR-Cas9-in-Complex-with-Guide-RNA-and-target-DNA.jpg
http://www.artofthecell.com/animation/crispr-cas9-gene-editing
http://www.rcsb.org/pdb/explore/explore.do?structureId=4OO8