Table 3.

Deletion mutations detected during serial passage in mosquito cells. *AA position in the gene (E3 or E2).

Nucleotide position	Region	Nucleotide change	AA position*	AA change	Virus harboring the mutation
					substitution frequency ≥20%	substitution frequency <20%
7512–26	Junction	Del-CAGCUACCUAUUUUG	—	—	A20-1, A20-2	—
8392–8394	E3	Del-UUC	15	Del-F	—	AE-1, AE-2
8563–8568	E2	Del-GUCUAU	8–9	Del-VY	—	C6-1
9037–9039	E2	Del-GAG	166	Del-E	AE-1, AE-2, A20-1, A20-2, C6-1, U4-1, U4-2	—