Affiliation: | aBiological Physics Research Group, Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom;;bSir William Dunn School of Pathology, University of Oxford, Oxford OX1 3RE, United Kingdom; and;cDivision of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, United Kingdom |