In addition, MPPED2 expression levels were also analyzed in the different BC molecular subtypes of the TCGA cohort (Lum A, Lum B, HER2 and TNBC): as reported in Figure 1C, MPPED2 was found to be downregulated in all molecular subtypes (****, p < 0.0001), in particular in HER2 and in TNBC ones. The gene discussed is ERBB2; the disease is breast cancer.