Institution: | 1.Protein Structure-Function Research Unit, School of Molecular and Cell Biology, University of the Witwatersrand, Johannesburg 2050, South Africa;2.Centre of Biophotonics, School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, U.K.;3.Biomedical Science Research Complex (BSRC), School of Biology, University of St Andrews, St Andrews KY16 9ST, U.K. |