Prepared by Omar Aranout, with contributions from Daimon Simmons, and Sudhir Nayak in Tim Schedl’s lab. If you have comments, suggestions, corrections, or improvements please e-mail them to  Siqun Xu at sxu@genetics.wustl.edu. Feel free to cut out all the detail you don’t want and make your own abridged version. This protocol is based on the […]