TABLE 1.

Biological titers of vectors used

Various vectors were produced according to the described methods. Biological titer was determined by serial dilution of vectors in HEK293T cells. The number of cells expressing β-galactosidase was determined 48 h post-transduction by manual counting. LFU, LacZ-forming units.

Vector	Biological titer (mean ± S.E.)
	LFU/ml
RV-G.HIV-1	3.59 ± 0.97 × 107
RV-G.HIV1-DiO	5.1 ± 2.11 × 107
RV-G.HIV1-DiD	7.4 ± 1.87 × 107
RV-G.HIV1-IN-GFP	1.1 ± 0.4 × 106
RV-G.HIV-1 (FlAsH)	2.29 ± 0.91 × 107
RV-G.HIV1-Cys4-MA-C (FlAsH)	1.72 ± 0.38 × 107
VSV-G.HIV-1	8.59 ± 3.4 × 107
RV-G.EIAV-Cys4-MA-C (FlAsH)	9.47 ± 0.13 × 106