1. Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto 862-0973, Japan
2. Section for Eukaryotic Biotechnology, Departments of System Biology, Technical University of Denmark, Building 221, 2800 Kongens Lyngby, Denmark
3. Department of Chemistry, Colorado State University, 301 West Pitkin Street, Fort Collins, Colorado 80523, United States
4. University of Colorado Cancer Center, Aurora, Colorado 80045, United States