1. Division of Molecular Medicine, Boston Children’s Hospital, Boston, MA 02115, USA.
2. Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA.
3. The Harvard Cryo-EM Center for Structural Biology, Harvard Medical School, Boston, MA 02115, USA.
4. Department of Biological Chemistry and Molecular Pharmacology, Blavatnik Institute, Harvard Medical School, Boston, MA 02115, USA.
5. SBGrid Consortium, Harvard Medical School, Boston, MA 02115, USA.