Institution: | 1. CIC bioGUNE, Structural Biology Unit, Bldg 800, Biscay Technology Park, , Derio, 48160 Basque Country, Spain;2. MRC Laboratory of Molecular Biology, , Cambridge, CB2 2QH UK;3. Department of Biochemistry and Molecular Biology, Faculty of Science and Technology, University of the Basque Country, , E‐48080 Bilbao, Spain |