MCM7 and lung carcinoma: Intriguingly, quantitative real-time PCR showed that expression levels of MCM7 in 9 lung cancer tissues (6 NSCLC cases and 3 SCLC cases) were significantly higher than those in 11 normal tissues containing lung, brain, colon, esophagus, eye, liver, rectum, stomach, bladder and kidney (Figure 1A).