I want to do western blot for my protein (Bcl-2 family molecular weight from 10 - 65 KDa , wich percentage of gel acrylamide i prepare? 10 % , 12 % or 15 %?
10 or 12% should work. Look at some published papers that contain whole-gel immunoblots for the BCL-2 proteins and see what the migration pattern looks like.