Fig. 3
From: Insights into the mechanism of L-malic acid on drip loss of chicken meat under commercial conditions
Effects of dietary MA supplementation on PM muscle metabolome in broilers (n = 6). A Partial least squares discriminant analysis (PLS-DA) shows the separation of data depending on MA supplementation. B Volcano plots of all metabolites. Red modes and blue modes represent up-regulated and down-regulated metabolites in the MA group, respectively. The dotted horizontal line indicates the threshold for a P-value of 0.05. C VIP scores show the top 20 metabolites responsible for the data separation. Red modes and blue modes represent up-regulated and down-regulated metabolites in the MA group, respectively. D The classification of total differential metabolites based on HMDB database annotation. E Enrichment analysis of differential metabolites based on the KEGG database. F The heatmap showing differential metabolites enriched in KEGG pathways