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. 2017 Sep 10;19(12):641–647. doi: 10.1016/j.micinf.2017.08.010

Fig. 2.

Fig. 2

Antibody responses in sera of mice immunized with M2e-FP-1 and M2e-FP-2 proteins. Mice were immunized with M2e-FP-1 and M2e-FP-2 proteins, or PBS as a control, and sera were collected at the indicated time points post-immunization to detect M2e-FP-specific IgG (A), IgG1 (B), and IgG2a (C) antibodies by ELISA. The antibody titers were expressed as the endpoint dilutions that remain positively detectable, and presented as mean ± SD of 5 mice in each group.