IFITM3 and Azoospermia: With regard to other germ cell marker genes, in mice, developmental pluripotency-associated protein 3 (DPPA3, also known as stella/PGC7), interferon-induced transmembrane protein 3 (IFITM3, also known as fragilis), and deleted in azoospermia-like (DAZL) have been investigated as potential markers for ES cell-derived germ cells [3].