KCNJ3 and invasive breast carcinoma: Overexpression of mRNA encoding the GIRK1 subunit, the product of the KCNJ3 gene, may contribute significantly to the malignant properties of breast cancers: using expression profiling, Stringer et al. [8] observed that RNA derived from KCNJ3 was aberrantly and highly overrepresented in primary invasive breast carcinomas when compared to the corresponding healthy breast tissue.