[1] Harvard Medical School,Department of Cell Biology
[2] 240 Longwood Avenue,Department of Biochemistry and Biophysics
[3] Boston,Division of Biology
[4] Massachusetts 02115,Department of Microbiology and Immunology
[5] USA,Department of Biochemistry
[6] MCD Biology,undefined
[7] University of Colorado Boulder,undefined
[8] The W.M. Keck Advanced Microscopy Laboratory,undefined
[9] University of California San Francisco,undefined
[10] 600 16th Street,undefined
[11] San Francisco,undefined
[12] California 94158,undefined
[13] USA,undefined
[14] Kansas State University,undefined
[15] 338 Ackert Hall,undefined
[16] Manhattan,undefined
[17] Kansas 66506,undefined
[18] USA,undefined
[19] University of California San Francisco,undefined
[20] 513 Parnassus Avenue,undefined
[21] San Francisco,undefined
[22] California 94143,undefined
[23] USA,undefined
[24] Protein Structure Laboratory,undefined
[25] Del Shankel Structural Biology Center,undefined
[26] University of Kansas,undefined
[27] IMCA-CAT Hauptman-Woodward Medical Research Institute,undefined
[28] 9700 South Cass Avenue,undefined
[29] Building 435A,undefined
[30] Argonne,undefined
[31] Illinois 60439,undefined
[32] USA,undefined
[33] Kansas State University,undefined
[34] 176 Chalmers Hall,undefined
[35] Manhattan,undefined
[36] Kansas 66506,undefined
[37] USA,undefined
[38] Present address: Graduate School of Medical Science and Engineering,undefined
[39] Korea Advanced Institute of Science and Technology,undefined
[40] Daejeon 305-701,undefined
[41] Korea.,undefined