To expand our knowledge on SEMGs expression in NSCLCs on the protein level, we decided to check the presence of highly homologous SEMG1 and SEMG2 proteins (Fig. 1a) in the panel of 5 adenocarcinoma and 1 squamous cell carcinoma NSCLC cell lines. The gene discussed is SEMG1; the disease is non-small cell lung carcinoma.