1. Max-Planck-Institut für Biochemie, Am Klopferspitz 18A, 82152 Martinsried, Germany, Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry, Ul. Miklukho-Maklaya 16/10, 117997 GSP-7 Moscow V-437, Russian Federation, Lomonosov State Academy of Fine Chemical Technology, Vernadsky prospekt 86, 117571 Moscow, Russian Federation, Department of Chemistry, University of Manitoba, Winnipeg, Canada R3T 2N2, and Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, Einsteinweg 55, P.O. Box...