Fig. 2

Data filtering and identification of DEGs in the myocardial ischemia–reperfusion injury tissue samples. A IQR boxplot and B PCA analysis show the data were well corrected. C Volcano plot of all genes. Red dots represented up-regulated genes and blue dots represented down-regulated genes. D Heat map for DEGs in myocardial ischemia–reperfusion injury and sham tissues. PCA, principal component analysis. DEGs, differentially expressed genes