toxic alkaloid produced by certain dinoflaggelates comprising toxic algal blooms in the oceans. Saxitoxin interferes with the movement of sodium in and out of muscle cells.
neurotoxin found in a variety of dinoflagellates. If ingested, it may cause respiratory failure and cardiac arrest.
Saxitoxin (STX) is a neurotoxin found in marine dinoflagellates (algae). It is a selective sodium channel blocker. The United States military isolated saxitoxin and assigned it the chemical weapon designation TZ.