TABLE 2.

Transduction of DGBE and CaCo-2 cells with lentivirus and murine retroviral vectors^a

Cells and vector	% GFP-positive cellsb
	Apical infection	Basolateral infection
CaCo-2
pLNCeGFP	2.6 ± 2	<0.5
pRtatpeGFP	43 ± 17	4.7 ± 1
pRRLcmveGFPsin	24 ± 16	<0.5
DGBE
pLNCeGFP	2.9 ± 1	2.4 ± 1
pRtatpeGFP	33 ± 25	<0.5
pRRLcmveGFPsin	3.8 ± 0.5	<0.5

^aConfluent monolayers of DGBE and CaCo-2 cells were transduced with first- and third-generation lentivirus vectors and a murine retroviral vector. Experiments were performed using at least two different viral preparations per virus type. 

^bResults are averages and standard deviations from at least three different independent experiments.