Table 4.

Nucleotide and amino acid sequence comparison of the eight WNV isolates collected in Florida during 2005.

	No. nucleotide bases
Gene	Analyzed	Variable	Informative*	Mean Nucleotide Distance (%)
Envelope	1296	72	17	0.46
NS3/4A	1611	85	22	0.49
	No. amino acid residues
Gene	Analyzed	Variable	Informative*	Mean Amino Acid Distance (%)
Envelope	432	23	7	0.50
NS3/4A	537	17	3	0.22

*Phylogenetically informative (differences occurring in two or more isolates) nucleotide and amino acid sites.