RBM10v2 has a common target greater homology with RBM5 than RBM10v1 and RBM5 as an example of the dichotomous functions of these variants, the RBM5-RBM10v2 complex regulates cell cycle progression and promotes apoptosis, while RBM10v1 inhibits tumor apoptosis in breast cancer. This evidence concerns the gene RBM5 and breast carcinoma.