SensiStain Anti-CD317 Antibody detects for the presence of CD317, also known as tetherin or BST2. Typically, CD317 is expressed on B cells and bone marrow stromal cells. In studies, CD317 plays a role in HIV-1, where it is a host factor whcich restricts the release of the HIV-1 within the plasma membrane of the producer cells; and in cancer, has been shown to promote the growth and survival of tumor cells.