CRISPR/Cas9 FAQs Answered!
Type
Blog Post
Published
March 13, 2014, 4:08 p.m.
...use double nickase, you could express two spacers and use PX335 to express the Cas9n (nickase).
The concept...oligo when cloning my target spacers into the PX330 vector backbone?
A2: There is no need to add the NGG...start site to have high expression, so adding this G could help with expression, though it is possible ...you need to have four spacers co-expressed and using PX335 to express the Cas9n (nickase).
Tips for using...co-deliver into the cells with the Cas9/sgRNAs vector (like PX330).
For large changes (>100 bp insertions...as the second design (in pX330/PX335), so we recommend people all use the pX330/PX335 system.
Additionally...concept of the double nickase system is that you can express two different chimeric gRNAs with the Cas9 nickase...