Hi everyone,
We designed gRNA with a maximum lenght of 20 nucleotide and I check my gRNA with Human Genom Browser/Blat web tools no matches found. However I use CCTop web tools ( https://crispr.cos.uni-heidelberg.de/) and results show that one gene sequance same my gRNA sequance but its has 1 mismatch. Is it important to 1 mismatch for Cas9 enzyme activity? Does Cas9 carry out strand-specific cleavage that gene?
Regards.
Ümit.