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]+	Assignment	Reference(s)
Microcystin	981	[Dha7] MC-LR	32, 12
	995	MC-LR	32, 12
	1,024	[Dha7] MC-RR	18, 12
	1,038	MC-RR	32, 12
	1,045	MC-YR	32, 12
	1,049	[H4] MC-YR	33, 12
	1,068	MC-WR	32, 12
Anabaenopeptin	821	Anabaenopeptin I	30
	837	Anabaenopeptin B	13, 10
	844	Anabaenopeptin A	13
	851	Anabaenopeptin F	44, 9
	858	Oscillamide Y	43
Microginin	726	Microginin FR5	PSD fragmentation; Neumann et al., unpublished data
	728	Microginin FR3	See microginin FR5
	740	Microginin FR6	See microginin FR5
	742	Microginin FR2	See microginin FR5
	749	Microginin FR10	See microginin FR5
	751	Microginin FR9	See microginin FR5
Aeruginosin	561	Aeruginosamide	25
	603	Aeruginosin-type	PSD fragmentation
	609	Microcin SF608	2
	653a	Aeruginosin 102A	28, 8
Cyanopeptolin	846b/828c	Cyanopeptolin-S	14, 8
	957b/939c	Cyanopeptolin D	27

^a[M − SO₃ + H]⁺. 

^b[M − SO₃ + H]⁺. 

^c[M − SO₃ − H₂O + H]⁺.