1. Laboratory
for Neurodegenerative Research, Ann Romney Center for Neurologic Diseases, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts 02115, United States
2. School
of Biomolecular and Biomedical Science, University College Dublin, Dublin 4, Republic of Ireland
3. Wyatt Technology Corporation, 18 Commerce Way, Woburn, Massachusetts 01801, United States
4. Department
of Biochemistry and Structural Biology, Lund University, PO
Box 124, SE221 00 Lund, Sweden