Naturally produced neurotoxin in certain species of marine dinoflagellates. One of the most potent natural toxins known, acts on the voltage-gated sodium channels of nerve cells, preventing normal cellular function and leading to paralysis.

SAXITOXIN (STX): "Saxitoxin is one of the most potent of the known natural toxins."
Cite this page: Nugent, Pam M.S., "SAXITOXIN (STX)," in, April 28, 2013, (accessed January 19, 2019).