GAS6 and breast cancer: To further exploring the in‐depth mechanisms of GAS6‐AS2 involved in breast cancer progression, subcellular localization was firstly defined by nuclear mass separation experiment, and we found GAS6‐AS2 was mainly located in cytoplasm in both T24 and 5637 cell lines, which indicated that GAS6‐AS2 owned the potential ability of functioning as competitive endogenous RNA (ceRNA)8 (Figure 5A).