Fig. 4From: Isobolographic analysis of co-administration of two plant-derived antiplasmodial drug candidates, cryptolepine and xylopic acid, in Plasmodium bergheiIsobologram of the co-administration of cryptolepine and xylopic acid. Filled circles indicate theoretical ED50 ± SEM while open circle indicate experimental ED50 ± SEM. The line of additivity connects the ED50 of Xylopic acid on the abscisa to that of cryptolepine on the ordinateBack to article page