Fig. 3

Analysis of HiPMO1 reaction products using MALDI-TOF–MS. a Various non-oxidized and oxidized oligosaccharides: non-oxidized oligosaccharides (m/z + 0), C4-oxidized oligosaccharides (C4-ketoaldoses) or C6-oxidized oligosaccharides (C6-hexodialdoses) (m/z − 2), C1-oxidized oligosaccharides (aldonic acids) (m/z + 16), C1-/C4-oxidized oligosaccharides (m/z + 14) or C6-oxidized glucuronic acid-containing oligosaccharides (m/z + 14), C1-/C6-oxidized glucuronic acid-containing oligosaccharide lactones or C4-/C6-oxidized glucuronic acid-containing oligosaccharides (m/z + 12), C1-/C6-/C4-oxidized glucuronic acid-containing oligosaccharides or C6-/C6-oxidized glucuronic acid-containing oligosaccharides (m/z + 28). b Potential structures of various oxidized and non-oxidized DP3 oligosaccharides. Only 1 of 3 potential C6-oxidized positions was marked