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(A) Comparative effects of Cepharanthin (CP) and component alkaloids on the activity of CQ against the K1 clone. Solid bars, all compounds at 500 nM; Shaded bars, all compounds at their relative concentrations in 500 nM Cepharanthin. (B) Synergy of the sensitizing effects of pairs of alkaloids on the activity of CQ against the K1 clone.
