Fig. 2From: Determination of the protective effects of Hua‐Zhuo‐Jie‐Du in chronic atrophic gastritis by regulating intestinal microbiota and metabolites: combination of liquid chromatograph mass spectrometer metabolic profiling and 16S rRNA gene sequencingQuality control (QC) chart for samples. a, b Principal component analysis (PCA) score charts in the positive and negative ion modes, different graphs represent different samples. Chinese medicine (CM) group samples = Green square, model (M) group samples = Dark blue dots, normal (N) group samples = Purple triangle, vitacoenzyme (V) group samples = Yellow rhombus, and QC samples = Light blue dots. c, d QC sample correlation map for the positive and negative ion modesBack to article page