TNFRSF25, also named as APO3, DDR3, DR3, TNFRSF12, WSL, WSL1, LARD, TRAMP and AIR, is a receptor for TNFSF12/APO3L/TWEAK. TNFRSF25 interacts directly with the adapter TRADD. It mediates activation of NF-kappa-B and induces apoptosis. TNFRSF25 may play a role in regulating lymphocyte homeostasis. It is constitutively and highly expressed by CD4(+)FoxP3(+) Tregs. This antibody can recognize all the isoform of TNFRSF25.