DOMOIC ACID is a (-) levorotatory excitatory amino acid neurotoxin that is an glutamate brain receptor (AMPA/KA and NMDA) agonist, which contains within it the structure of glutamic acid, and is a structural analog of proline and a neurotoxin called kainic acid (also an analog of the excitatory amino acid L-glutamate). All these molecules, domoic acid, kainic acid and glutamate, act on diverse glutamate receptors.