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A neurotoxin produced by dinoflagellates (e.g. Alexandrium catenella) responsible for the ‘red tide’ phenomenon. Filter-feeding shellfish, such as the clam Saxidomus giganteus, can accumulate the toxin and cause paralytic shellfish poisoning if eaten. The toxin binds to sodium channels and blocks development of action potentials.

Subjects: Science and Mathematics — Medicine and Health.

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