Cleavage of a Neuroinvasive Human Respiratory Virus Spike Glycoprotein by Proprotein Convertases Modulates Neurovirulence and Virus Spread within the Central Nervous System. oleh Alain Le Coupanec, Marc Desforges, Mathieu Meessen-Pinard, Mathieu Dubé, Robert Day, Nabil G Seidah, Pierre J Talbot