Northern blot (NB), real-time RT-PCR and western blot (WB) showed that CSTA was not detected in all lung cancer cell lines at both mRNA (Figure 1A and Supplementary Figure 1A) and protein (Figure 1B) levels except H1650 compared to HBEC and Small airway epithelial cells (SAEC). The gene discussed is CSTA; the disease is lung cancer.