Table 3. C→T mutations in Vif variants from North India.

Mutations	Vif C (S1, S3 and S17)	Vif B/C (VT3 and VT4)	Vif B (D43, E43, D48 and E48)
C138T	✘	✓	✓
C333T	✘	✘	✓
C391T	✘	✘	✓
C539T	✓	✓	✘
A3G degradation	High	High	Low