Hi Bishoy. Unfortunately i cannot help you find a suitable antibody for your studies. I however hope you will share your experience with these antibodies on www.pAbmAbs.com. Here, scientists can share information about antibodies they use in their research and your experience with these antibodies is very important as you can save time and money for other scientists looking for suitable antibodies against dcas9. Currently, more than 1000 different antibodies have been reviewed by scientists all over the world, and i hope you will contribute as well. Thank you :)