1. Starch, Applied Discovery, Research & Development Novozymes A/S, Laurentsvej 51-53, DK-2880 Bagsvaerd, Denmark.
2. Center for Microbial Biotechnology, BioCentrum-DTU, Building 223 Technical University of Denmark, DK-2800 Lyngby.
3. Corresponding author. Phone: +45 4525 2677, Fax: +45 4588 4148 E-mail: lo@biocentrum.dtu.dk