Authors: Norman Zielke; Kerry J Kim; Vuong Tran; Shusaku T Shibutani; Maria-Jose Bravo; Sabarish Nagarajan; Monique van Straaten; Brigitte Woods; George von Dassow; Carmen Rottig; Christian F Lehner; Savraj S Grewal; Robert J Duronio; Bruce A Edgar Journal: Nature Date: 2011-10-30 Impact factor: 49.962