Cleavage of a Neuroinvasive Human Respiratory Virus Spike Glycoprotein by Proprotein Convertases Modulates Neurovirulence and Virus Spread within the Central Nervous System. - Le Coupanec A; Desforges M; Meessen-Pinard M; Dubé M; Day R; Seidah NG; Talbot PJ (PLoS pathogens, 2015)