^aDepartment of Molecular Behavioral Biology, Osaka Bioscience Institute, 6-2-4 Furuedai, Suita, Osaka 565-0874, Japan

^bDepartment of Immunoregulation, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-oka, Suita, Osaka 565-0871, Japan

^cGraduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan

^dPhysiologisch-chemisches Institut der Universität Tübingen, Hoppe-Seyler-Str. 4, 72076 Tübingen, Germany

^eDepartment of Molecular Protozoology, Research Institute for Microbial Diseases, Osaka University, Suita, 3-1 Yamada-oka, Suita, Osaka 565-0871, Japan

^fUnited States Army Medical Research Unit-Kenya, Unit 64109, APO AE 09831-64109, Kenya

^gFaculty of Sciences, Kinshasa University, P.O. Box 190 Kinshasa XI, Democratic Republic of the Congo

^hNational Food Research Institute, Ministry of Agriculture, Forestry and Fishers, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan