Five glioma cell lines, including primary glioma cells (PGC) established in March 2016 from tumor cells taken from a patient with a left tempus glioblastoma, and one astrocyte cell line were then examined for CBX7 expression, and the data showed that CBX7 expression was higher in the astrocyte cell line than any of the five glioma cell lines (U118, A172, T98G, LN229 or PGC) (Figure 1E). The gene discussed is CBX7; the disease is glioblastoma.