Algae Aphanizomenon flos-aquae

Ikawa, M., Wegener, K., Foxall, T.L., Sasner, J.J. (1982). Comparison of the toxins of the blue-green alga Aphanizomenon flos-aquae with the Gonyaulax toxins. Toxicon 20 747-52. 

Adelman WJ Jr, Fohhneister JF, Sasner JJ Jr, Ikawa M (1982) Sodium channels blocked by aphantoxin obtained from the blue-green alga, Aphanizomenon flos-aquae. Toxictm 20 513-516. doi 0041-0101(82)90017-4 [pii]... 

Saxitoxin may be found in oysters, common whelks and other species of marine molluscs, but can occur also in some microscopic freshwater blue-green algae Aphanizomenon flos-aquae) and red macroscopic algae of the genus Jania, which become the source of saxitoxin in crab meat. 

Ikawa, M., K. Wegener, T. L. Faxall, and J. J. Sasner, Jr. Comparison of theToxins of the Blue-Green Alga Aphanizomenon flos-aquae with the Gonyaulax Toxins. Toxicon 20, 747 (1982). 

Aphanorphine alkaloid possesses narcotic analgetic and anesthetic activity ° and was isolated from the freshwater blue-green alga, Aphanizomenon flos-aquae. 

Gulavita N, Hori A, Shimizu Y, Laszlo P, Clardy J. Aphanor-phine, a novel tricyclic alkaloid from the blue-green alga Aphanizomenon flos-aquae. Tetrahedron Lett. 1988 29 (35) 4381 384. 

The saxitoxins have also been found in the freshwater cyanophyte Aphanizomenon flos aquae (9,1 ) and, quite recently, in tropical marine coralline algae of the genus Jania (11)... 

Figure 1. Structure of anatoxin-a from Anabaena flos-aquae NRC-44-1, saxitoxin and neosaxitoxin. Saxitoxin and neosaxitoxin is produced by certain species of marine algae and by the freshwater cyanobacteria Aphanizomenon flos-aquae NH-5.

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