Table 1.

Th polarization

	pGag (titer)	pGag + pTat (titer)	Blank (titer)
IgG1 (Th2)	300	300	50 (negative)
IgG2a (Th1)	50 (negative)	350	50 (negative)
Th1:Th2 index	0.17	1.17	--
	pEnv (titer)	pEnv + pTat (titer)	Blank (titer)
IgG1 (Th2)	600	750	50 (negative)
IgG2a (Th1)	650	750	50 (negative)
Th1:Th2 index	1.08	1	--
	pPol (titer)	pPol + pTat (titer)	Blank (titer)
IgG1 (Th2)	200	200	50 (negative)
IgG2a (Th1)	50 (negative)	400	50 (negative)
Th1:Th2 index	0.25	2	--

The mean value of each group of mice (the same data as showed in Figure 4B) was showed in this table, and used to calculate the index of IgG2a/IgG1 [26]. Th-polarization response in mice was determined according to the value of IgG2a/IgG1 [27,28]. The value of Th1:Th2 are accurate to two decimal places. All experiments were repeated once, and the results were consistent.