The percentage of 5–8 F NPC cells in G2/M phase (a relatively radiation-sensitive phase of the cell cycle) was 17.37 ± 2.58% and 31.21 ± 1.12% after overexpression of Notch2 alone and radiotherapy alone, respectively; however, the percentage of 5–8 F NPC cells in G2/M phase increased to 60.06 ± 2.75% when overexpressing Notch2 and subjected to radiotherapy (Figure 3(a)). This evidence concerns the gene NOTCH2 and nasopharyngeal carcinoma.