Effect of Gymnodinium Breve Toxin(s) on Frog Skin and the Giant Axon of the Squid

Abstract
A partially purified toxin from the dinoflagellate Gymnodinium breve was found to elicit a transient increase in the active transport in frog skin, and a spontaneous train of action potentials in the giant axon of the squid. Both effects were concentration dependent, reversible, and suggest the existence of unique sites of action of this toxin.