1. Shemyakin‐Ovchinnikov Institute of Bioorganic Chemistry Russian Academy of Sciences Moscow Russia
2. Protein Structure Section, Macromolecular Crystallography Laboratory National Cancer Institute Frederick MD USA
3. Basic Science Program, Leidos Biomedical Research Frederick National Laboratory for Cancer Research Frederick MD USA
4. Laboratory of Molecular Biology National Institute of Diabetes and Digestive and Kidney Diseases Bethesda MD USA