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. 2015 Sep 11;282(21):4218–4241. doi: 10.1111/febs.13417

Figure 5.

Figure 5

GC‐MS measurements of the products of glucose oxidation catalysed by Am PDH. (A) Total ion chromatogram of the Am PDH reaction products after 120 min on the HP1MS column with EI‐MS detection. EI‐MS of two‐step derivatizations of 2‐keto‐d‐glucose (B1), 3‐keto‐d‐glucose (B2) and 2,3‐diketo‐d‐glucose (B3). The red arrow in (B2) indicates the peak that was used to differentiate between 2‐keto‐d‐glucose and 3‐keto‐d‐glucose. Isotopologue fraction of the protonated molecular ion of ethoxymation‐trimethylsilylation derivatization products of 2,3‐diketo‐d‐glucose: theoretical distribution (C1) and experimental distribution (C2).