Fig. 3 Titers of sera IgG antibodies to purified VLP and lysates of infected Sf9 cell. L1A indicated sera from the L1A group of mice. -VLP indicated ELISA plate coated with VLP. -sfvlp indicated ELISA plate coated with lysates of Sf9 cells infected by rBacV16 L1. -sf. indicated ELISA plate coated with lysates of normal Sf9 cells.