Institution: | From ‡Mass Spectrometry of Biomacromolecules and ;**Molecular Microbial Physiology, Swammerdam Institute for Life Sciences and ;‖Biomolecular Synthesis, Van ‘t Hoff Institute for Molecular Sciences, Universiteit van Amsterdam, Kruislaan 904, 1098 XH Amsterdam, The Netherlands and ;§Department of Medical Biochemistry, Academic Medical Centre, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands |