ACVR1B and breast cancer: In addition, apart from the positive correlation between LINC01116 and the aforementioned genes involved drug resistance in ER− samples (Table 3), there is a positive correlation between LINC01116 and Activin A Receptor Type 1B (ACVR1B, also known as ALK4), which is related to the TGF‐β superfamily and promotes invasion, EMT, and metastasis in breast cancer.59