title: Isolation and structures of five microcystins from a Russian Microcystis aeruginosa strain CALU 972.
abstract: Five microcystins were obtained from Microcystis aeruginosa strain CALU 972 isolated from a hepatotoxic water bloom collected in Lake Kroshnosero (Russia). The structure of a new toxin (1) was determined as [Dha7]microcystin-YR by amino acid analyses and fast atom bombardment mass spectrometry, and the toxins 2, 3, 4, and 5 were assigned the structures as [Dha7]microcystin-LR, [D-Asp3,Dha7]microcystin-LR, [Dha7]microcystin-RR, and [D-Asp3,Dha7]microcystin-RR, respectively, by direct comparison with authentic samples.
authors: Department of Microbiology, University of Helsinki, Finland.
authors: K
authors: K
authors: Sivonen
authors: M
authors: M
authors: Namikoshi
authors: W R
authors: WR
authors: Evans
authors: B V
authors: BV
authors: Gromov
authors: W W
authors: WW
authors: Carmichael
authors: K L
authors: KL
authors: Rinehart
mesh_terms: D000595:Amino Acid Sequence; D000596:Amino Acids / Q000032:analysis; D008387:Marine Toxins; D052998:Microcystins; D046931:Microcystis / Q000737:chemistry*; D008969:Molecular Sequence Data; D010456:Peptides, Cyclic / Q000032:analysis / Q000302:isolation & purification*; D012426:Russia
chemical_list: D000596:Amino Acids; D008387:Marine Toxins; D052998:Microcystins; D010456:Peptides, Cyclic; C065685:microcystin YR; C063855:microcystin RR; C057862:cyanoginosin LR