Higher mRNA expression levels of RPN2, DAD1, OSTC, KRTCAP2 and lower expression levels of TUSC3, MAGT1 could be found in different types of BC compared to the normal breast tissues in Curtis’s dataset (22), Zhao’s dataset (24), Ma’s dataset (25), Finak’s dataset (26), Karnoub’s dataset (27), and TCGA dataset. The gene discussed is DAD1; the disease is breast cancer.