1. Department of Chemistry & Biochemistry, University of Lethbridge, Lethbridge, AB, T1K 3M4, Canada
2. Division of Biology & Biological Engineering, California Institute of Technology, Pasadena, CA 91125, USA
3. Gene Vector Core, Advanced Technology Cores, Baylor College of Medicine Houston, TX 77030, USA
4. Pharmaron Biologics Ltd, Speke, Liverpool, L24 8RB, UK
5. Department of Molecular & Cellular Biology, Baylor College of Medicine, TX 77030, USA
6. Department of Chemistry & Biochemistry, University of Montana, Missoula, MT 59812, USA