The O323 antibody reacts with human CD27 (TNFRSF7), a cell surface homodimer of 55 kDa subunits, which provides co-stimulatory signaling in support of the T cell (TCR) and B cell (BCR) receptors. By comparison with CD28, whose TCR co-stimulatory signal can trigger cell proliferation, CD27 signaling appears to promote cell survival and differentiation to effector / memory stages. Also in contrast with CD28, the CD27 receptor may be shed following interaction with its ligand CD70, which is typically expressed on activated dendritic cells, T cells and B cells. With respect to B cells, CD27 is considered to be a phenotypic marker for memory B cells. CD27 has been included within a group of phenotypic markers for identifying human B regulatory cells (Bregs), a cell type proposed to regulate CD4+ T cell proliferation and Foxp3 / CTLA-4 expression in Treg cells. The O323 antibody may be used for analysis of CD27 expression on peripheral T cells, and is frequently used in combination with antibodies for IgD and IgM to distinguish naïve vs. memory B cell populations. For identification of Breg cells, this antibody has been used in combination with antibodies for CD25, CD27, CD1d, IL-10 and TGF-beta (Kessel et al. 2012. Autoimm. Rev. 11(9): 670-677). The antibody is also reported for cross-reactivity with Baboon, Cynomolgus and Rhesus CD27.
Immunogen information for this antibody is proprietary information.
Inflammation & Immunology
This mouse monoclonal antibody Anti-CD27 (human), APC & clone O323 validated for use in Flow Cytometry for the detection of CD27.
The monoclonal antibody was purified from tissue culture supernatant via affinity chromatography. The purified antibody was conjugated under optimal conditions, with unreacted dye removed from the preparation.
Flow Cytometry Analysis: 0.25 µg of this antibody detected CD27 in one million human peripheral blood lymphocytes.
Purified mouse monoclonal antibody in buffer containing 10 mM NaH2PO4, 150 mM NaCl, 0.1% gelatin, pH 7.2, and up to 0.1% sodium azide.
Size Exclusion Chromatography
Storage and Stability
It is recommended to store the product undiluted at 2-8°C and protected from prolonged exposure to light. Do not freeze.
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