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. Author manuscript; available in PMC: 2015 Dec 5.
Published in final edited form as: Carbohydr Res. 2014 Sep 10;0:33–43. doi: 10.1016/j.carres.2014.08.016

Figure 6.

Figure 6

LC/MS chromatograms of isomeric hexasulfated tetrasaccharides ΔU2S-ANS6S-I2S-ANS6S and ΔU2S-ANS6S-I2S-MNS6S before (a) and after (b) periodate treatment (40 h). In panel (c) we show the mass spectrum of the peak generated by periodate oxidation after 5 days but not after 40h because for the latter case the peak intensity was too low for exact mass determination.

Peak broadening may be explained by presence of numerous forms of the oxidized tetrasaccharide because aldehyde groups reversibly react with water and methanol present in the mobile phase