Has bactericidal activity. Strong expression in the testis, liver, gall bladder and kidney. Also expressed in the ovary and male and female reproductive tracts. Expressed in the ovarian stroma and the theca and granulosa layers of the ovarian follicle. Detected in the theca and granulosa layers of the ovarian follicle in the white follicle (WF), F1, F3, F5, and postovulatory follicle stages. Expression in the theca and granulosa layers of the F3 stage ovarian follicle is not affected by intravenous injection of LPS. Belongs to the beta-defensin family.