Fig. 4.

Characterisation of oligosaccharides in SEC fraction Ms10_55. a DASH capillary electropherograms showing four unknown oligosaccharides N₆, N₇, N₈ and N₉. b MALDI-ToF–MS of the 2-AA labelled oligosaccharides, showing a major sodiated and doubly sodiated ion corresponding to Pent₅ (m/z 822.0, m/z 844.0, respectively) and a minor ion corresponding to Pent₆ (m/z 954.0 and 976.0, respectively). c HILIC separation of structural isomers of m/z 822.0 [M + Na]⁺ followed by off-line-MALDI-ToF–MS, results in the EIC showing three structural isomers Z₁, Z₂ and Z₃, respectively