TABLE 1.

IgG responses after 3 weeks in mice vaccinated with various plasmids^a

Antigen	Log10 antibody titer in mice vaccinated with:
	pCl		pCIBFR		pCIP39
	IgG1	IgG2a	IgG1	IgG2a	IgG1	IgG2a
BFR				2.3 ± 0.06
P39					4.7 ± 0.12	5.0 ± 0.1
16M				2.0 ± 0.02	3.2 ± 0.05	3.5 ± 0.09
544				2.0 ± 0.04	3.2 ± 0.06	3.5 ± 0.04

^aSera from four mice per group, collected 3 weeks after the last vaccination, were assayed individually by ELISA.