Abstract
1Laboratory for Intestinal Flora, Frontier Research Program, Saitama 351-01, and Department of Biomedical Science, Faculty of Agriculture, The University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
2Japan Collection of Microorganisms, Saitama 351-01, and Department of Biomedical Science, Faculty of Agriculture, The University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
3The Institute of Physical and Chemical Research. Wako, Saitama 351-01, and Department of Biomedical Science, Faculty of Agriculture, The University of Tokyo, Bunkyo-ku, Tokyo 113, Japan