The TTF-1 mRNA transcript levels in 10 NSCLC cell lines showed that the median TTF-1 mRNA expression levels relative to the average of A549 cells were 2.6 for MGH24, 3.9 for H125, 0.02 for H460, 0.3 for H520, 0.02 for H157, 1.1 for MGH8, 0.00 for MGH7, 5.2 for RVH6849 and 0.5 for H1264. The gene discussed is TTF1; the disease is non-small cell lung carcinoma.