Probable transcriptional regulator. Expressed in embryonic stem cells (ES). Belongs to the Nanog homeobox family. Could be the product of a pseudogene. According to PubMed:15233988. Exists an other tandem duplicated gene (NANOG) and 10 other NANOG-related nucleotide sequences located on different chromosomes, all of which are processed pseudogenes lacking introns (NANOGP2 to NANOGP11); except NANOGP8 which is a retrogene.