Rapid fixation of a distinctive sequence motif in the 3â² noncoding region of the clade of West Nile virus invading North America
Keywords: 3â²NCR; 3â² noncoding region; 5â²NCR; 5â² noncoding region; dN; the number of nonsynonymous nucleotide substitutions per nonsynonymous site; dS; the number of synonymous nucleotide substitutions per synonymous site; JEV; Japanese encephalitis virus; K