Characteristics of a Microcystin-Degrading Bacterium under Alkaline Environmental Conditions

Table 1

Parent and daughter ions of the primary degradation product.

m/z	Identity
1013.6	M + H (Adda-Glu-Mdha-Ala-Leu-Masp-Arg-OH + 2H)
571.4	Mdha-Ala-Leu-Masp-Arg-OH + 2H
304.4	Masp-Arg-OH + 2H
213.3	Glu-Mdha + H
175.5	Arg-OH + 2H
132.2	PhCH2CHOCH

∗Adda is 3-amino-9-methoxy-2, 6, 8-trimethyl-10-phenyldeca-4, 6-dienoic acid. Mdha is N-methyldehydroalanine, and Masp is D-β-methylaspartic acid.