May be involved sperm-egg plasma membrane adhesion and fusion during fertilization . Exhibits bacteriolytic activity in vitro against Micrococcus luteus and Staphylococcus aureus (, ). Shows weak bacteriolytic activity against Gram-positive bacteria at physiological pH . Bacteriolytic activity is pH-dependent, with a maximum at around pH 5.6 .
Subcellular locations: Secreted, Cell surface, Cell projection, Cilium, Flagellum
Detected on the postacrosomal membrane of mature spermatozoa .
Expressed in testis, epididymis and spermatozoa (at protein level) (, ). Expressed in late-stage spermatocytes and round spermatids .