Table 2. Inhibitory activity of peptides on infection by primary HIV-1 isolates ^a .

Compound	EC50 (nM) for inhibiting
	US4/GS 007 (B, R5)	93IN101 (C, R5)	92TH009 (A/E, R5)
(N36M)3	9.4 ± 1.2	5.9 ± 2.0	1.5 ± 0.1
(N36MEK1)3	29.2 ± 11.2	20.1 ± 5.6	14.5 ± 4.1
(N36MEK2)3	7.1 ± 2.5	5.2 ± 0.9	1.5 ± 0.6
T20	20.4 ± 2.9	22.1 ± 0.9	19.0 ± 0.5

^aPeptides were tested in triplicate, and the data are presented as the mean ± standard deviation.