Plays a role in fertilization by controlling binding of sperm to zona pellucida and migration of spermatozoa into the oviduct (By similarity). May play a role in signal transduction and promote protein tyrosine phosphorylation (By similarity).
Subcellular locations: Cell membrane, Membrane raft, Cytoplasmic vesicle, Secretory vesicle, Acrosome, Secreted, Cytoplasmic vesicle
Located on plasma membrane of spermatocytes, round and elongated spermatids, and testicular spermatozoa.
Detected in testis and spermatogonia. Not detected in spermatocytes. Detected in blood leukocytes.