Finally, intriguingly, although the predicated molecular mass of Nanog protein (for both Nanog1 and NanogP8) is ∼35 kD, numerous studies have reported putative Nanog proteins migrating, on SDS-PAGE, at apparent molecular mass of 29 to 80 kD in ES, EC, and somatic cancer cells (Table 1)[2], [5], [17], [24]–[26], [46]–[59]. Here, NANOG is linked to cancer.