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Competition between Stx1a and Stx2a. Vero-d2EGFP cells were processed for cytofluorometry after an 18-h incubation with Stx1a (A), Stx2a (B), or a mixture of both toxins (C). In panel C, the orange trace represents cells incubated with a mixture of 0.1 ng/ml Stx1a and 1 ng/ml Stx2a, whereas the blue trace represents cells incubated with a mixture of 0.1 ng/ml Stx1a and 10 ng/ml Stx2a. Unintoxicated Vero-d2EGFP cells were also processed for each condition.
