1 Protocol Exchange Essential technical tips for STAP cell conversion culture from somatic cells Haruko Obokata1 , Yoshiki Sasai2 and Hitoshi Niwa3 * 1 Laboratory for Cellular Reprogramming, 2 Laboratory for Organogenesis and Neurogenesis, 3 Laboratory for Pluripotent Stem Cell Studies, RIKEN Center for Developmental Biology, Kobe 650-0047, Japan *To whom correspondences should be addressed. Hito