Probable RNA-binding protein, which may be required during spermatogenesis. May act by binding to the 3'-UTR of mRNAs and regulating their translation (By similarity). Interacts with DAZ1 and DAZL. Testis specific. Not expressed in early embryos, primoridal germ cells and spermatogonial cells. First expressed in the cytoplasm of spermatocytes and then persists through meiosis. First expressed in stage III spermatocytes and peaks in late pachytene or diplotene stage spermatocytes. Expressed in secondary spermatocytes and early spermatids, then decreases until it is undetectable in spermatids. Belongs to the RRM DAZ family.