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Mass spectrum m/z of 1,001 from B-3501 GXM. This ion represents an oligosaccharide of 2,004 g/mol mass, owing to its double ionization. The double ionization is observable by the difference of a m/z of 0.5 between ionized peaks, instead of the anticipated m/z of 1 for singly ionized peaks. The predicted composition is Man9GlcA3, equivalent to three M6 repeating units.
