CD39 Mouse anti-Human, PerCP-Cy5.5, Clone: TU66, BD

The TU66 monoclonal antibody reacts with human CD39 also known as ectonucleoside triphosphate diphosphohydrolase 1 (ENTPD1) an ectoenzyme that degrades ATP to AMP. It is a member of the family of ectonucleoside triphosphate dihydrolases (E-NTPDases) known to be involved in regulation of extracellular nucleotide catabolism, controlling the extracellular nucleoside triphosphate pool (NTP). CD39 is expressed on a subset of T cells, B cells and dendritic cells with weak staining of monocytes and granulocytes. Recently, CD39 has been found to be expressed primarly by immune-suppressive Foxp3(+) regulatory T (Treg) cells in both human and mice. In humans, CD39 is restricted to a subset of Foxp3+ regulatory effector/memory-like T cells. In mice, the enzyme is present on most if not all CD4+CD25+ cells and CD39 expression is driven by Foxp3. It is thought that CD39 allows Treg cells to enter inflamed areas where high levels of ATP are present.