1. Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, Texas Tech University Health Sciences Center, Lubbock, TX 79430
2. School of Biological Sciences, Illinois State University, Normal, IL 61790
3. Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, IL 60637
4. Department of Biology, Saint Francis University, Loretto, PA 15940
5. Department of Basic Medical Sciences, Cellular and Structural Physiology Institute, Graduate School of Pharmaceutical Sciences, Nagoya University, Nagoya 464-8601, Japan