Affiliation: | 1. Department of Molecular Biology, Umeå University, Umeå, Sweden.; 2. Umeå Centre for Microbial Research, Umeå University, Umeå, Sweden.; 3. Department of Chemistry, Umeå University, Umeå, Sweden.; 4. College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, People''s Republic of China.;Universidad Nacional, Heredia, Costa Rica |