[1] ETH Honggerberg, Inst Mol Biol, CH-8093 Zurich, Switzerland
[2] Univ Wisconsin, Dept Biochem, Madison, WI USA
[3] NIDDK, Chem Phys Lab, NIH, Bethesda, MD 20892 USA
[4] Water Res Inst, Tsukuba, Ibaraki, Japan
[5] Univ Nijmegen, Biophys Chem Lab, Nijmegen, Netherlands
[6] Univ Utrecht, Dept Chem, NL-3508 TC Utrecht, Netherlands
[7] Univ Alberta, Dept Biochem, Edmonton, AB, Canada
[8] Scripps Res Inst, Dept Mol Biol, La Jolla, CA 92037 USA