1 Department of Pharmacology & Therapeutics, McGill University, Montreal, Quebec, Canada; Centre de Recherche en Biologie Structurale, Montreal, Quebec, Canada. Electronic address: jeanfrancois.trempe@mcgill.ca.
2 Department of Biochemistry, McGill University, Montreal, Canada; Centre de Recherche en Biologie Structurale, Montreal, Quebec, Canada. Electronic address: kalle.gehring@mcgill.ca.