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

Michio Namikoshi, Kaarina Sivonen, William R. Evans, Furong Sun, Wayne W. Carmichael, Kenneth L. Rinehart

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish (US)
Pages (from-to)1473-1479
Number of pages7
Issue number11
StatePublished - Nov 1992

ASJC Scopus subject areas

  • Toxicology

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