CRISPR 101: Cas9 Nickase Design and Homology Directed Repair
Type
Blog Post
...double-strand break, and when used with two adjacent gRNAs, can lower the probability of off-target editing. In this...both strands bluntly with WT Cas9 and one gRNA, you can create a staggered cut using a Cas9 nickase and two...target different strands to create a DSB, but this can be accomplished with either a PAM-in or PAM-out orientation...20% repair efficiency. Clearly, a nickase strategy can expand the targetable region, which is especially...site. So if you can’t find a good gRNA that cuts close to your insertion site, you can’t obtain high HDR...