1. Applied and Industrial Mycology, Fungal Biodiversity Centre/CBS, Uppsalalaan 8, 3584 CT Utrecht, the Netherlands
2. Laboratory of Plant Physiology, Wageningen University, Arboretumlaan 4, 6703 BD Wageningen, the Netherlands
3. Laboratory of Biophysics, Wageningen University, and Wageningen NMR Center, Dreijenlaan 3, 6703 HA Wageningen, the Netherlands
4. DSM Food Specialties R&D, P.O. Box 1, 2600 MA Delft, the Netherlands