S100A6 and non-small cell lung carcinoma: Among the genes displaying the most significant differences in methylation, SERPINB5 (serpin family B member 5) and S100A6 (S100 calcium binding protein A6) hypermethylation, and CAT (catalase) and BNC1 (basonuclin 1) hypomethylation were implicated in radioresistance of NSCLC.