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. 2018 Jun 11;8:8894. doi: 10.1038/s41598-018-26962-9

Figure 6.

Figure 6

Effects of PQQ on glutamate content (A) in hippocampus of the D-gal-treated mice. *P < 0.05, **P < 0.01 relative to control group. #P < 0.05, ##P < 0.01 relative to D-gal group. Negative-mode electrospray ionization mass spectra of production PQQ-glu (B) by UPLC.