CTAG1B and lung cancer: Three lung cancer cell lines (NCI-2170, SK-LC-02, and SK-LC-05) exhibited approximately equal proportions of methylated and unmethylated NY-ESO-1 alleles (40–60% methylation), while two remaining cell lines (SK-LC-17 and SK-LC19) exhibited NY-ESO-1 hypomethylation, <10% methylation (Figure 1A).