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Toxic Cyanobacteria in Svalbard: Chemical Diversity of Microcystins Detected Using a Liquid Chromatography Mass Spectrometry Precursor Ion Screening Method

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Academic year: 2021

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Figure 1. Structure of microcystin-LR and the 6 microcystin (MC) congeners identified in this study (ADMAdda = O-acetyl-O-demethyl 3-amino-9-methoxy-2,6,8-trimethyl-10-phenyldeca-4,6-dienoic acid, Ala = alanine, Arg = arginine, Asp = aspartic acid, Dha = d
Figure 2. Base-peak chromatograms of positive ion scans (left; m/z 450-1150) and precursor ion scans (right; m/z 135 for Adda-containing compounds or m/z 265 for ADMAdda-containing compounds) for (a) SV-81 (Category 1) and (b) SV-02 (Category 3)
Table 1. Cont. Sample Extracted Mass [g] ELISA[µg/L] LC-MS Precursor Ion Category (1–3) LC-MS/MS Characterization Genes SV-14 0.025 0 n.a
Figure 3. Phylogenetic composition of Svalbard samples based on 16S ribosomal RNA gene amplification using 454 sequencing and filtered for solely cyanobacterial reads

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