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. 1992 Nov;30(11):1473-9.
doi: 10.1016/0041-0101(92)90523-8.

Isolation and structures of microcystins from a cyanobacterial water bloom (Finland)

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Isolation and structures of microcystins from a cyanobacterial water bloom (Finland)

M Namikoshi et al. Toxicon. 1992 Nov.

Abstract

A hepatotoxic cyanobacterial (blue-green algal) water bloom was collected from a constructed water reservoir in Finland. The water bloom contained two cyanobacterial species, Microcystis aeruginosa and Aphanizomenon flos-aquae. Two hepatotoxins, 1 and 2, were isolated from extracts of lyophilized cells. The structures of 1 and 2 were assigned based upon their amino acid analyses on a Waters Pico Tag HPLC system and a chiral GC capillary column (Chirasil Val III), fast atom bombardment mass spectrometry (FABMS), high resolution FABMS, and tandem FABMS data. Toxin 1 was identical to a previously reported compound, [D-Asp3]microcystin-RR. Toxin 2 was new and was assigned the structure [D-Asp3]microcystin-YR.

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