Differences in the immunogenicity of various MSP1
proteins after homologous and heterologous immunizations of inbred BALB/c were tested by ELISA for reactivity against homologous (Panel A) and heterologous (Panel B) MSP1
proteins. X-axis = time point (two weeks post first or second immunization) using ELISA plate antigens: MSP142 3D7, FVO and CAMP. Data are expressed as the mean μg/mL mouse IgG (+/−SEM). n = 20 mice/group, two independent immunization experiments.