Fig. 3
From: Changes in the salivary metabolome in patients with chronic erosive gastritis
Differential metabolite hierarchical clustering diagram in positive(A) and negative(B) ion mode. The ordinate represents the metabolites that are significantly differently expressed, and the abscissa is the sample information. Red represents significantly up-regulated metabolites, blue represents significantly down-regulated metabolites, and the gray part represents no quantitative information on the metabolite