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. 2017 Nov 22;8(68):112598–112609. doi: 10.18632/oncotarget.22607

Figure 2. Identification of a metabolic ion of m/z 147.0764 with an RT of 1.44 min.

Figure 2

(A) The MS spectrum at 147.0764 m/z. The intensity of the ion was lower in serum from IHCC patients (red peaks) than control subjects (blue peaks). (B) Candidate HMBD metabolites yielding 147.0764 m/z ions. Two metabolic compounds were selected as candidates for the metabolic ion, HMDB00641 (L-glutamine) and HMDB02031 (ureidoisobutyric acid). (C) Structures of the candidate metabolites. (D) MS/MS patterns of the 147.0764 m/z ions from L-glutamine and ureidoisobutyric acid. The MS/MS pattern of the IHCC metabolic ion of 147.0764 m/z was identical to that of L-glutamine.