1. Group of Molecular and Industrial BiotechnologyDepartment of Chemical EngineeringUniversitat Politècnica de Catalunya Rambla, Sant Nebridi 22 Terrassa 08222 Spain
2. Center of Excellence for Polysaccharide ResearchInstitute of Organic Chemistry and Macromolecular ChemistryFriedrich Schiller University of Jena Humboldtstraße 10 Jena 07743 Germany