TABLE 3.

Inhibition of viral infectivity of HIV released from cells chronically infected with HIV transduced with F12-HIV vif- or nef-expressing retrovirus vector^a

Cells	RTb	Viral infectivityc
D10	3.7 × 105	3 × 104
D10/L-NGFr	5.3 × 105	2 × 104
D10/vif	6.6 × 105	9 × 102
		95.5d
D10/nef	3.8 × 105	1.1 × 102
		99.5d

^aData from a representative of three independent experiments are reported. 

^bValues are expressed in counts per minute per milliliter and normalized for 10⁶ cells after background subtraction. 

^cValues are expressed as TCID₅₀ per milliliter × 10⁻⁶ cells. 

^dPercentages of inhibition with respect to L-NGFr-transduced D10 cells are indicated.