Harmful algal blooms (HABs) represent both ecological and public health hazards in the marine environment. Indeed, some algae can produce metabolites that have negative effects on marine ecosystems and mammals. Kainoid derivatives such as kainic acid (KA) and domoic acid (DA) are considered some of the most toxic metabolites of marine origin biosynthesized by a limited number of micro-and macroalgae. While recent works have provided the first insights into the biosynthetic route of KA in red algae and DA in diatoms, the DA biosynthetic [a] P.