has role is protonated form of domoate(2-) tricarboxylic acid domoic acid CHEBI:34727 An <small>L</small>-proline derivative that is <small>L</small>-proline substituted by a carboxymethyl group at position 3 and a 6-carboxyhepta-2,4-dien-2-yl group at position 4. It is produced by the diatomic algal <em>Pseudo-nitzschia</em>. It is an analogue of kainic acid and a neurotoxin which causes amnesic shellfish poisoning (ASP). pyrrolidinecarboxylic acid neurotoxin neuromuscular agent hapten marine metabolite non-proteinogenic L-alpha-amino acid L-proline derivative algal metabolite