While the BRG1 protein was mostly lost in the BRG1-mutant NSCLC cell lines (e.g., A549, H23, and H522), it was also seen in some BRG1-WT lines (e.g., Calu3; Table S1), likely due to non-genetic (epigenetic) silencing, as previously reported [25,48,49]. The gene discussed is SMARCA4; the disease is non-small cell lung carcinoma.