CD8 alpha Antibody (4B11)


Immunohistochemistry-Paraffin: CD8 alpha Antibody (4B11) [NB100-65729] - Human Tonsil, Mag. 40X.

Product Details

Reactivity HuSpecies Glossary
Applications IHC, IHC-Fr, IHC-P
This product is unpurified. The exact concentration of antibody is not quantifiable.

Order Details

CD8 alpha Antibody (4B11) Summary

Synthetic peptide derived from CD8 alpha chain sequence.
Recognizes the human CD8 cell surface antigen, a 32kD glycoprotein expressed by the cytotoxic/suppressor subset of T-cells and weakly by NK cells. Clone 4B11 has been reported as being suitable for use in Western blotting.
Tissue culture supernatant
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Packaging, Storage & Formulations

Store at 4C short term. Aliquot and store at -20C long term. Avoid freeze-thaw cycles.
0.09% Sodium Azide
This product is unpurified. The exact concentration of antibody is not quantifiable.
Tissue culture supernatant


  • Immunohistochemistry 1:10-1:500
  • Immunohistochemistry-Frozen 1:20-1:40
  • Immunohistochemistry-Paraffin 1:20-1:40
Application Notes
This product requires antigen retrieval using heat treatment prior to staining of paraffin sections. 1mM EDTA pH8.0 is recommended for this purpose.
Theoretical MW
26 kDa
Read Publication using NB100-65729.

Alternate Names for CD8 alpha Antibody (4B11)

  • CD8 antigen, alpha polypeptide (p32)
  • CD8
  • CD8a antigen
  • CD8a molecule
  • Leu2 T-lymphocyte antigen
  • Leu2
  • MAL
  • OKT8 T-cell antigen
  • p32
  • RPA-T8 antibody flow
  • RPA-T8 Antibody
  • RPA-T8 CD8
  • RPA-T8 Clone
  • RPA-T8 Flow
  • T cell co-receptor
  • T8 T-cell antigen
  • T-cell antigen Leu2
  • T-cell surface glycoprotein CD8 alpha chain
  • T-lymphocyte differentiation antigen T8/Leu-2


The CD8 antigen is a cell surface glycoprotein found on most cytotoxic T lymphocytes that mediates efficient cell to cell interactions within the immune system. The CD8 antigen, acting as a coreceptor, and the T cell receptor on the T lymphocyte recognize antigen displayed by an antigen presenting cell (APC) in the context of class I MHC molecules. The functional coreceptor is either a homodimer composed of two alpha chains, or a heterodimer composed of one alpha and one beta chain. Both alpha and beta chains share significant homology to immunoglobulin variable light chains.


This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

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Publications for CD8 alpha Antibody (NB100-65729)(1)

Reviews for CD8 alpha Antibody (NB100-65729) (0)

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Product General Protocols

Find general support by application which include: protocols, troubleshooting, illustrated assays, videos and webinars.

FAQs for CD8 alpha Antibody (NB100-65729). (Showing 1 - 6 of 6 FAQ).

  1. I'm looking for a good anti CD8  antibody working on immunofluorescence on murine tumoral tissue fixed in paraformaldehyde, cryoprotected with sucrose, frozen in OCT medium and sectioned with a cryostat.
    • I would recommend our CD8 alpha antibody NBP1-49045, it is guaranteed to work in IHC-P and and IHC-FR.   
  2. How do I know if this will actually work in IHC?
    • This CD8 alpha antibody has been validated in IHC and has been cited in a paper where it was used in IHC.
  3. Will this CD8 alpha antibody work for rabbit in IHC-FR?
    • Unfortunately this CD8 alpha antibody has not yet been validated in rabbit and there no sequence info in uniprot yet so we can't speculate based on homology. You may want to take advantage of our innovator's reward program which will allow you to test in rabbit without any financial risk. 
  4. Does this CD8 alpha antibody detect both forms of CD8?
    • Both the alpha - beta heterodimer as well as the alpha - alpha homodimer are detected by the (53-6.7) CD8 alpha antibody.
  5. Would you recommend your CD8 alpha antibody as a T-Cell marker? 
    • Yes this CD8 alpha anitbody has been cited in a study where it was used in FACS to separate out CD8+ T-cells. Please see the references tab PMID: 1608966. It is important to note that our CD8 alpha antibody may also stain mature dendritic cells and NK cells.
  6. What aa sequence of CD8 was used to generate this monoclonal? I am looking for cross-reactive antibodies to another species and this information would be useful.
    • For NB100-65729 the immunogen is CKSGDKPSLSARYV.

Positive Control Lysate(s)

Secondary Antibodies


Isotype Controls

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Blogs on CD8 alpha.

CD8 alpha - Marker for cytotoxic T lymphocytes
The T-cell co-receptor CD8 is a cell-surface glycoprotein that bridges the lipid bilayer by interacting externally with ligands, such as major histocompatibility complex (MHC) class I, as well as internally with signaling molecules such as tyrosine ki...  Read full blog post.

Contact Information

Product PDFs


Gene Symbol CD8A

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