CD8 (EP334) Rabbit Monoclonal Antibody

Tonsil stained with anti-CD8

CD8 (EP334) Rabbit Monoclonal Antibody

Updated: 2017-05-24 08:46:09

CD8 (cluster of differentiation 8) is a transmembrane glycoprotein that functions as a co-receptor with the T-cell receptor (TCR). The CD8 molecule consists of a heterodimer of α and β chains covalently linked by a disulfide bond, and is predominantly expressed on the surface of cytotoxic T cells. CD8 expression can also be detected on natural killer cells, cortical thymocytes, and dendritic cells.

Cytotoxic CD8+ T lymphocytes are crucial components of the adaptive immune system that execute immunosurveillance to eliminate nascent tumor cells. Upon simultaneous binding to the major histocompatibility complex (MHC) class I molecule with the TCR, cytotoxic T-cell sensitivity is increased 100-fold. CD8 is commonly expressed in T-cell large granular lymphocyte leukemia and is also co-expressed with CD4 in some T-lymphoblastic lymphoma.

Recently, detection of tumor infiltrating CD8+ lymphocytes have been correlated with favorable prognosis and improved survival in patients with colorectal, ovarian, esophageal, renal, lung and pancreatic tumors. A high CD8+/CD4+ T-cell ratio is also associated with improved survival in colon and ovarian cancer patients.


  • Reactivity: paraffin
  • Visualization: membranous
  • Control: Tonsil
  • Dilution Range: 1:100 - 1:200*

Package Inserts

No SDS found.

Ordering Information

For in vitro diagnostic (IVD) use in USA

1 mL concentrateAC-0301
0.1 mL concentrateAC-0301A

This product is not available in Canada

For in vitro diagnostic (IVD) use in Europe

1 mL concentrateAC-0301
0.1 mL concentrateAC-0301A

For research use only (RUO) in Japan

1 mL concentrateAC-0301
0.1 mL concentrateAC-0301A


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