May play a role in the flagellum biology. Detected in the cytoplasm of germ cells in all stages of development up to the cytoplasmic lobes of elongated spermatids, whereas it appeared stronger in the nucleus of premeiotic and meiotic germ cells. Localizes in the headpiece and midpiece of ejaculated sperm. Expressed in testes and ejaculated spermatozoa (at protein level).