Abstract
Contents of three neuroexcitatory amino acids, N- methyl- d,l-aspartic acid (NMA), kainic acid (KA) and domoic acid (DA) were investigated in 46 marine algae species. NMA was detected in very small amounts in several marine algae belonging to the Chlorophyceae and Rhodophyceae, but not in algae belonging to the Phaeophyceae. KA was detected in three species and DA was detected in four species all belonging to the family Rhodomelaceae (Ceramiales, Rhodophyceae). Among rhodomelacean algae investigated in this study, KA and DA were detected only in the particular species collected in the south-west Islands of Japan (Tokunoshima Island and Okinawa Main Island). It is noteworthy that the distribution of both KA and DA was strictly restricted some algae of the subtropical area.
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