RRM2 and breast carcinoma: Genes that were significantly enriched in RRM2-high breast cancer subgroups controlled cancer undifferentiation, Sarrio’s epithelial-mesenchymal transition, breast cancer progenitor-like phenotypes, proliferation gene signature, Chang’s core serum response gene signature, and the Naderi breast cancer prognosis (up) gene signature (Figure 1A through 1 F).