1. Department of Biological Sciences, Middle East Technical University, Ankara 06800, Turkey
2. Institute of Biochemistry and Molecular Medicine, University of Bern, CH-3012 Bern, Switzerland
3. Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, IA 50011, USA
4. Department of Veterinary Microbiology and Preventive Medicine, Iowa State University, Ames, IA 50011, USA
5. Aptalogic Inc., Ames, IA 50014, USA