1. Chemistry Department, Moscow State University, SU-117234, Moscow, USSR
2. Institute of Biochemistry, USSR Academy of Sciences, SU-117071, Moscow, USSR
3. All-Union Research Institute of Applied Enzymology, SU-232028, Vilnius, Lithuanian, SSR
4. Institute of Organic Chemistry and Biochemistry, Czechoslovak Academy of Sciences, CS-166 10, Prague, Czechoslovakia