1. Department of Biomaterials Sciences, Graduate School of Agricultural and Life Sciences, University of Tokyo, l-l-l, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan, and Institute for Microbial and Biochemical Technology, Forest Products Laboratory, 1 Gifford Pinchot Drive, Madison, Wisconsin 53726
2. Institute for Microbial and Biochemical Technology, Forest Products Laboratory, 1 Gifford Pinchot Drive, Madison, Wisconsin 53726
3. Department of Biomaterials Sciences, Graduate School of Agricultural and Life Sciences, University of Tokyo, l-l-l, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
4. Biology Department, Clark University, Worcester, Massachusetts 01610
5. Architecture et Fonction des Macromolécules Biologiques, Aix-Marseille University, CNRS, 163 Avenue de Luminy, 13288 Marseille, France