West Nile Virus Methyltransferase Catalyzes Two Methylations of the Viral RNA Cap through a Substrate-Repositioning Mechanism

Hongping Dong, Suping Ren, Bo Zhang, Yangsheng Zhou, Francesc Puig-Basagoiti, Hongmin Li and Pei-Yong Shi

Journal of Virology 82 ( 9 ): 4295 - 4307 , 2008