CD8a Antibody

• Description:

  CD8 is a cell surface receptor expressed either as a heterodimer with the beta chain or as a homodimer. A majority of thymocytes and a subpopulation of mature Tcells and NK cells express CD8a. It binds to MHC class 1 and through its association with protein tyrosine kinase p56lck plays a role in Tcell development and activation of mature Tcells. For mature Tcells, CD8 and 4 are mutually exclusive, so antibody to CD8 is generally used in conjunction with antibody to CD4. CD8a antibody is a useful marker for distinguishing helper/inducer T-lymphocytes, and most peripheral Tcell lymphomas are CD4+/CD8-. Anaplastic large cell lymphoma is usually CD4+/CD8-, and in T-lymphoblastic lymphoma/leukemia, they are often co-expressed. It is also found in littoral cell angioma of the spleen.

• Specifications:

  Immunohistology (FFPE) : 1-2 µg/mL for 30 min at RT (1), Prediluted IHC only format: incubate for 30 min at RT (2)

• Host:

  Mouse

• Reactivity:

  Human

• Immunogen:

  Human recombinant protein was used as the immunogen for this CD8a antibody.

• Clonality:

  Monoclonal

• Isotype:

  IgG1 k

• Clone:

  CLDA8a-1

• Applications:

  IHC-P

• Purity:

  Protein G affinity chromatography

• Format:

  Purified

• Buffer:

  1X PBS, pH 7.4

• Reconstitution:

  CD8a antibody with azide can be stored at 2-8oC. The azide-free format should be aliquoted and stored at -20oC or colder.

• Limitations:

  This CD8a antibody is available for research use only.

• Storage Conditions:

  CD8a antibody with azide can be stored at 2-8°C. The azide-free format should be aliquoted and stored at -20°C or colder.

• Formulation:

  0.2 mg/mL in 1X PBS with 0.1 mg/mL BSA (US sourced) and 0.05% sodium azide

• Applications Notes:

  The concentration stated for each application is a general starting point. Variations in protocols, secondaries and substrates may require the CD8a antibody to be titered up or down for optimal performance.1. The prediluted format is supplied in a dropper bottle and is optimized for use in IHC. After epitope retrieval step (if required), drip mAb solution onto the tissue section and incubate at RT for 30 min.

• CAS Number:

  9007-83-4

• Location:

  Cell surface

• Image Legend:

  IHC analysis of FFPE human tonsil and CD8a antibody (clone CLDA8a-1) . Staining of formalin-fixed tissues requires boiling tissue sections in pH 9 10mM Tris with 1mM EDTA for 10-20 min followed by cooling at RT for 20 min.