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CTX1B standard curve (left) and a fish extract analyzed by cell-based assay (CBA-N2A, right). The extract illustrated here is a Seriola rivoliana specimen and demonstrates ciguatoxin-like activity (cytotoxicity exclusively in the presence of O/V) corresponding to an estimated 0.362 ng CTX1B equiv. g−1. Each point represents the mean ± SEM of triplicate values for a single experiment. O: ouabain; V: veratridine.
