More info on CRISPR - Yesterday MIT revealed their discovery of the structure of key CRISPR complex.

http://web.mit.edu/newsoffice/2014/research-reveals-structure-of-key-crispr-complex-0213.html

"Research reveals structure of key CRISPR complex: Work reveals how a genome-editing tool works to correct errors in the genetic code. Veronica Meade-Kelly, Broad Institute"

This image of the Cas9 complex depicts the Cas9 protein (in light blue), along with its guide RNA (yellow), and target DNA (red).