A GPI-linked membrane glycoprotein and antiviral factor that functions as a homodimer. It is induced by INTERFERON-GAMMA and blocks the release of enveloped mammalian viruses by directly tethering nascent VIRAL PARTICLES to the membranes of infected cells.

Synonyms: 0, CD317 Antigens, Tetherin, Antigen, CD317, CD317 Antigen, Antigens, CD317, Bone Marrow Stromal Antigen 2, Bone Marrow Stromal Cell Antigen 2