Do you have the cas9 antibody?
FAQ from OriGene
We do have Cas9 antibody (cat# TA190309). In our CRISPR/Cas9 vectors, Cas9 has a C-terminal Myc-DDK tag. DDK is the same as Flag. You can try OriGene’s anti-DDK antibody (SKU TA50011-100)
Access to all Origenes' vectors