1. Israel Structural Proteomics Center; Weizmann Institute of Science; Rehovot 76100 Israel
2. Department of Biological Chemistry; Weizmann Institute of Science; Rehovot 76100 Israel
3. CAS Key Laboratory of Receptor Research, Drug Discovery and Design Center, Shanghai Institute of Materia Medica; Chinese Academy of Sciences (CAS); Shanghai (22) China
4. Department of Structural Biology; Weizmann Institute of Science; Rehovot 76100 Israel
5. Department of Neurobiology; Weizmann Institute of Science; Rehovot 76100 Israel
6. Department of Biochemistry and Molecular Biology; Universidad de Salamanca; Salamanca 37007 Spain
7. Department of Biochemistry; Netherlands Cancer Institute; Amsterdam CX 1066 the Netherlands
8. Department of Chemical Research Support; Weizmann Institute of Science; Rehovot 76100 Israel