Figure 2. (A, B) DEG analysis for TCGA-BRCA. (C) PPI network of the TCGA-BRCA DEGs. (D) Hub node numbers in the PPI network of the TCGA-BRCA DEGs. Abbreviations: DEGs: differentially expressed genes; TCGA-BRCA: The Cancer Genome Atlas Breast Invasive Carcinoma; PPI network: protein-protein interaction network.