Description
The L203.rMab is a recombinant monoclonal antibody that was derived from L203 hybridoma cells. The L203.rMab specifically recognizes a monomorphic epitope on the extracellular region of human HLA-DR antigens which are human Major Histocompatibility Complex (MHC) Class II antigens. HLA-DR antigens are heterodimers comprised of two different type I transmembrane glycoproteins that are noncovalently-associated. The ~34 kDa HLA-DR alpha (HLA-DRα) chain is encoded by HLA-DRA whereas the ~28 kDa HLA-DR beta (HLA-DRβ) chains are encoded by one of the 4 different HLA-DRB loci (HLA-DRB1,3,4,5) that are located within the Human Leukocyte Antigen (HLA) Complex of chromosome 6. Each chain is comprised of an extracellular region with an IgSF domain, followed by a transmembrane sequence and a short cytoplasmic tail. The L203.rMab antibody recognizes a common determinant that is dependent on the association of HLA-DR alpha and beta chains. HLA-DR is variably expressed on B cells, activated T cells and NK cells, monocytes, macrophages, dendritic cells (DC), Langerhans cells, thymic epithelial cells, and tumor cell lines including B cell lines, myelomas, and some myeloid leukemias. HLA-DR functions in the presentation of peptide antigens to CD4+ T lymphocytes in the generation and regulation of adaptive immune responses. HLA-DR expressed on thymic stromal cells plays a key role in the positive and negative selection of CD4+ T cells during thymopoiesis. Certain HLA-DR alleles, polymorphisms or aberrant expression patterns are associated with susceptibility to diseases including autoimmunity and cancer. L203 antibody binding is reportedly blocked by the L243 monoclonal antibody suggesting that the two antibodies recognize crossreactive or spatially related determinants on HLA-DR.
BD® CompBeads can be used as surrogates to assess fluorescence spillover (Compensation). When fluorochrome conjugated antibodies are bound to BD® CompBeads, they have spectral properties very similar to cells. However, for some fluorochromes there can be small differences in spectral emissions compared to cells, resulting in spillover values that differ when compared to biological controls. It is strongly recommended that when using a reagent for the first time, users compare the spillover on cells and BD® CompBeads to ensure that BD® CompBeads are appropriate for your specific cellular application.
Store undiluted at 4°C and protected from prolonged exposure to light. Do not freeze. The monoclonal antibody was purified from tissue culture supernatant or ascites by affinity chromatography. The antibody was conjugated to the dye under optimum conditions and unreacted dye was removed.
1. Please refer to www.bdbiosciences.com/us/s/resources for technical protocols.
2. Alexa Fluor® 488 fluorochrome emission is collected at the same instrument settings as for fluorescein isothiocyanate (FITC).
3. Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.
4. For fluorochrome spectra and suitable instrument settings, please refer to our Multicolor Flow Cytometry web page at www.bdbiosciences.com/colors.
5. An isotype control should be used at the same concentration as the antibody of interest.
6. This reagent has been pre-diluted for use at the recommended Volume per Test. We typically use 1 × 10^6 cells in a 100-µl experimental sample (a test).
7. This product is provided under an intellectual property license between Life Technologies Corporation and BD Businesses. The purchase of this product conveys to the buyer the non-transferable right to use the purchased amount of the product and components of the product in research conducted by the buyer (whether the buyer is an academic or for-profit entity). The buyer cannot sell or otherwise transfer (a) this product (b) its components or (c) materials made using this product or its components to a third party or otherwise use this product or its components or materials made using this product or its components for Commercial Purposes. Commercial Purposes means any activity by a party for consideration and may include, but is not limited to: (1) use of the product or its components in manufacturing; (2) use of the product or its components to provide a service, information, or data; (3) use of the product or its components for therapeutic, diagnostic or prophylactic purposes; or (4) resale of the product or its components, whether or not such product or its components are resold for use in research. For information on purchasing a license to this product for any other use, contact Life Technologies Corporation, Cell Analysis Business Unit Business Development, 29851 Willow Creek Road, Eugene, OR 97402, USA, Tel: (541) 465-8300. Fax: (541) 335-0504.
8. Please refer to http://regdocs.bd.com to access safety data sheets (SDS).
9. Alexa Fluor™ is a trademark of Life Technologies Corporation.
10. Source of all serum proteins is from USDA inspected abattoirs located in the United States.
