CD3 Monoclonal Antibody (HIT3a), Functional Grade, eBioscience™, Invitrogen™

Description

• Description: The HIT3a monoclonal antibody reacts with human CD3e, a 20 kDa subunit of the TCR complex
• Along with the other CD3 subunits gamma and delta, the epsilon chain is required for proper assembly, trafficking and surface expression of the TCR complex
• CD3 is expressed by thymocytes in a developmentally regulated manner and by all mature T cells
• Crosslinking of TCR with HIT3a initiates an intracellular biochemical pathway resulting in cellular activation and proliferation
• Applications Reported: The HIT3a antibody has been reported for use in flow cytometric analysis
• Applications Tested: The HIT3a antibody has been tested by flow cytometric analysis of normal human peripheral blood cells
• This can be used at less than or equal to 0.25 μg per test
• A test is defined as the amount (μg) of antibody that will stain a cell sample in a final volume of 100 μL
• Cell number should be determined empirically but can range from 10^5 to 10^8 cells/test
• It is recommended that the antibody be carefully titrated for optimal performance in the assay of interest
• Storage and handling: Use in a sterile environment
• Filtration: 0.2 μm post-manufacturing filtered
• Purity: Greater than 90%, as determined by SDS-PAGE
• Endotoxin Level: Less than 0.001 ng/μg antibody, as determined by LAL assay
• Aggregation: Less than 10%, as determined by HPLC
• The CD3 subunit complex which is crucial in transducing antigen-recognition signals into the cytoplasm of T cells and in regulating the cell surface expression of the TCR complex
• T cell activation through the antigen receptor (TCR) involves the cytoplasmic tails of the CD3 subunits CD3 gamma, CD3 delta, CD3 epsilon and CD3 zeta
• These CD3 subunits are structurally related members of the immunoglobulins super family encoded by closely linked genes on human chromosome 11
• The CD3 components have long cytoplasmic tails that associate with cytoplasmic signal transduction molecules and this association is mediated at least in part by a double tyrosine-based motif present in a single copy in the CD3 subunits
• CD3 may play a role in TCR-induced growth arrest, cell survival and proliferation
• The CD3 antigen is present on 68-82% of normal peripheral blood lymphocytes, 65-85% of thymocytes and Purkinje cells in the cerebellum
• It is never expressed on B or NK cells
• Decreased percentages of T lymphocytes may be observed in some autoimmune diseases
• The genes encoding the CD3 epsilon, gamma and delta polypeptides are located on chromosome 11
• Defects in the CD3 gene are associated with CD3 immunodeficiency.