Affiliation: | 1. Department of Molecular Microbiology, John Innes Centre, Norwich, NR4 7UH, UK;2. Centre for Bacterial Cell Biology, Biosciences Institute, Medical School, Newcastle University, Newcastle upon Tyne, NE2 4AX, UK;3. Chemistry Platform, John Innes Centre, Norwich, NR4 7UH, UK;4. Department of Biological Chemistry, John Innes Centre, Norwich, NR4 7UH, UK |