Although these Abs readily immunoprecipitated down the 42 kD endogenous Nanog protein in NTERA-2 NE (Fig. 3A–D; Fig. S2), and the rNanogP8 proteins made from somatic cancer cells (Fig. 7), they did not pull down the 42 kD or other NanogP8 proteins in cultured cancer cell NE (Fig. 3A–D; Fig. S2A). This evidence concerns the gene NANOG and cancer.