NANOG and germinoma: 2D, underlined and in bold). The array hybridization signal for POU5F1 is shown in Figure. 2E. The high expression of POU5F1, as well as that of another stemness gene NANOG in germinomas, was verified by qPCR (Figure 2F). In contrast, SNAI2 (SLUG) is overexpressed in NGMGCTs (Figure 2E-F).