Affiliation: | 1.Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK;2.Department of Physiology, Development and Neuroscience, University of Cambridge, Downing St., Cambridge CB2 3DY, UK;3.Wellcome Trust Medical Research Council Stem Cell Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QR, UK;4.Department of Biochemistry and Molecular Biology, BioMedical Center, University of Iceland, 101 Reykjavík, Iceland |