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Table 2 Negative molecular ions analysis of HiPMO1 reaction products hydrolyzed by beta-glucuronidase and beta-glucosidase

From: Polysaccharide monooxygenase-catalyzed oxidation of cellulose to glucuronic acid-containing cello-oligosaccharides

m/z Molecular ions of potential products m/z Molecular ions of potential products
102 174 − 2H+ + CH3OH/2 206 180 + 180 − 2H+ + 3H2O/2
106 178 − 2H+ + 2H2O/2 218 210 + 210 − 2H+ + H2O/2
109 174 − 2H+ + HCOOH/2 224 176 − H+ + NH3 + CH3OH
113 210 − 2H+ + H2O/2 227 210 − H+ + H2O
121 176 − 2H+ + CH3OH + 2H2O/2 230 196 − H+ + NH3 + H2O
122 178 − 2H+ + CH3OH + 2H2O/2 233 174 − H+ + CH3COOH
127 210 − 2H+ + HCOOH/2 236 174 − H+ + NH3 + HCOOH
135 194 − 2H+ + HCOOH + CH3OH/2 240 192 − H+ + NH3 + CH3OH
180 − 2H+ + 2HCOOH/2 178 − H+ + NH3 + HCOOH
137 194 − 2H+ + HCOOH + 2H2O/2 243 194 − H+ + CH3OH + H2O
180 − 2H+ + CH3COOH + 2H2O/2 180 − H+ + HCOOH + H2O
139 174 − 2H+ + HCOOH + CH3COOH/2 249 196 − H+ + 3H2O
141 178 − 2H+ + HCOOH + CH3COOH/2 252 176 − H+ + NH3 + CH3COOH
192 − 2H+ + 2HCOOH/2 259 192 − 2H+ + Na+ + HCOOH
151 176 − 2H+ + 2H2O + CH3OH + CH3COOH/2 178 − 2H+ + Na+ + CH3COOH
194 − 2H+ + H2O + CH3OH + CH3COOH/2 261 194 − 2H+ + Na+ + HCOOH
155 174 − 2H+ + H2O + 2CH3COOH/2 180 − 2H+ + Na+ + CH3COOH
192 − 2H+ + 2CH3COOH/2 265 194 − H+ + 4H2O
162 194 − 2H+ + 3H2O + HCOOH + CH3OH/2 269 210 − H+ + CH3COOH
180 − 2H+ + 3H2O + 2HCOOH/2 272 210 − H+ + NH3 + HCOOH
168 210 − 2H+ + 2H2O + CH3OH + CH3COOH/2 196 − H+ + NH3 + CH3COOH
196 − 2H+ + 2H2O + HCOOH + CH3COOH/2 277 196 − 2H+ + Na+ + CH3COOH
171 194 − 2H+ + 4H2O + CH3OH + HCOOH/2 210 − 2H+ + Na+ + HCOOH
180 − 2H++4H2O + 2HCOOH/2 278 180 − H+ + NH3 + 2H2O + HCOOH
173 174 − H+ 194 − H+ + NH3 + 2H2O + CH3O
175 176 − H+ 281 210 − H+ + 4H2O
187 180 + 196 − 2H+/2 285 194 − H+ + CH3OH + CH3COOH
189 180 + 178 − 3H+ + Na+/2 180 − H+ + HCOOH + CH3COOH
193 194 − H+ 289 194 − H+ + 2H2O + CH3COOH
195 196 − H+ 180 − H+ + H2O + CH3OH + CH3COOH
196 180 − H+ + NH3 291 196 − H+ + 2H2O + CH3COOH
197 180 − H+ + H2O 210 − H+ + 2H2O + HCOOH
200 210 + 192 − 2H+/2 292 180 − H+ + NH3 + 2H2O + CH3COOH
204 196 + 196 − 2H+ + H2O/2
180 + 194 − 2H+ + 2H2O/2
194 − H+ + NH3 + 2H2O + HCOOH
  1. The products were analyzed by Full Scan LC–MS in negative mode. Data are from Additional file 1: Figure S6. Because of the presence of NH3, CH3OH, HCOOH, and CH3COOH in the sample solutions, the products formed adduct ions with them. Glucose (m/z 180−), glucuronic acid (m/z 194−), gluconic acid (m/z 196−), saccharic acid (m/z 210−), gluconic acid lactone (m/z 178−), saccharic acid lactone (m/z 192−), reduced Vc (m/z 176−), oxidized Vc (m/z 174−)