PLAC1 and CT-X expression in NSCLC samples. Heatmap of PLAC1 and CT-X (NY-ESO-1, LAGE1, MAGEA1, MAGEA3, MAGEA4) expression in 156 NSCLC samples as assessed by a semi-quantitative RT-PCR. The genes were classified into highly expressed (red), expressed (pink), marginally expressed and not expressed as judged by the intensity of the ethidium bromide staining in agarose gels.