–Ivanova L, Zandberga E, Siliņa K, Kalniņa Z, Ābols A, Endzeliņš E, et al. Prognostic relevance of carbonic anhydrase IX expression is distinct in various subtypes of breast cancer and its silencing suppresses self-renewal capacity of breast cancer cells. Cancer Chemother Pharmacol. 2015 Feb;75(2):235–46–Tatiparti K, Sau S, Gawde KA, Iyer AK. Copper-Free “Click” Chemistry-Based Synthesis and Characterisation of Carbonic Anhydrase-IX Anchored Albumin-Paclitaxel Nanoparticles for Targeting Tumor Hypoxia. Int J Mol Sci. 2018 Mar 13;19(3). This evidence concerns the gene CA9 and breast cancer.