1. Department of Biochemistry, University of Cambridge, Hopkins Building, The Downing Site , Tennis Court Road , Cambridge CB2 1QW, UK
2. Department of Physics, University of Warwick , Coventry CV4 7AL, UK
3. Microscopy Core Facility, Sainsbury Laboratory, University of Cambridge , Bateman Street , Cambridge CB2 1LR, UK
4. Department of Biochemistry, University of Cambridge, Sanger Building , 80 Tennis Court Road , Cambridge CB2 1GA, UK
5. Novozymes A/S , Krogshøjvej 36 , 2880 Bagsværd, Denmark