1. Department of Structural Biology; Weizmann Institute of Science; Israel
2. McKusick-Nathans Institute of Genetic Medicine; Johns Hopkins School of Medicine; Baltimore
3. Laboratory of Bioorganic Chemistry of Enzymes; Institute of Chemical Biology and Fundamental Medicine; Novosibirsk Russia
4. Ambry Genetics; California
5. Molecular and Human Genetics, Baylor College of Medicine; Houston Texas
6. Wellcome Centre for Mitochondrial Research, Newcastle University; Newcastle NE2 4HH United Kingdom