1. Institut für Kristallographie, Freie Universität Berlin, Takustrasse 6, D-14195 Berlin, FRG, GMD-SCAI, Schloss Birlinghoven, D-53754 Sankt Augustin, FRG, School of Pharmaceutical Sciences, Mukogawa Women's University, 11-68 Koshien, Kyuban-cho, Nishinomiya, Hyogo 663, Japan, Institute of Cell and Molecular Biology, University of Edinburgh, The King's Buildings, Mayfield Road, Edinburgh EH9 3JH, United Kingdom, and Biochemical Research Laboratory, Ezaki Glico Co., Ltd., 4-6-5 Utajima, Nishiyodogawa, Osaka...