RBM3 and breast carcinoma: RBM3 (P98179, RNPL) was among sets of RNA-binding proteins (RNA-BPs) detected in invasive pseudopodia of mesenchymal breast cancer cells30, and in subcellular specializations termed spreading initiation centers (SICs)31 that form during the initial stage of cell spreading in fibroblasts and many mesenchymal cell lines32.