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Induction of C susceptibility by spider and bacterial sphingomyelinases. C-dependent haemolysis of erythrocytes after incubation with L. intermedia toxin P1 (•) or with C. pseudotuberculosis PLD (○). The haemolysis assay was carried out under classical (a) and alternative (b) pathway conditions. Results are representative of three different experiments carried out in duplicate represented as mean±SD.
