Table 2.

Oligopeptides detected in Microcystis colonies from Lake Wannsee in 1999 using MALDI-TOF MS (results from positive-ion mass spectra and PSD measurements)

Substance class[M+H]+AssignmentReference(s)
Microcystin981[Dha7] MC-LR 32, 12
995MC-LR 32, 12
1,024[Dha7] MC-RR 18, 12
1,038MC-RR 32, 12
1,045MC-YR 32, 12
1,049[H4] MC-YR 33, 12
1,068MC-WR 32, 12
Anabaenopeptin821Anabaenopeptin I 30
837Anabaenopeptin B 13, 10
844Anabaenopeptin A 13
851Anabaenopeptin F 44, 9
858Oscillamide Y 43
Microginin726Microginin FR5PSD fragmentation; Neumann et al., unpublished data
728Microginin FR3See microginin FR5
740Microginin FR6See microginin FR5
742Microginin FR2See microginin FR5
749Microginin FR10See microginin FR5
751Microginin FR9See microginin FR5
Aeruginosin561Aeruginosamide 25
603Aeruginosin-typePSD fragmentation
609Microcin SF608 2
653a Aeruginosin 102A 28, 8
Cyanopeptolin846b/828c Cyanopeptolin-S 14,8
957b/939c Cyanopeptolin D 27
  • a [M − SO3 + H]+.

  • b [M − SO3 + H]+.

  • c [M − SO3 − H2O + H]+.