HLA-DRB monoclonal antibody, clone SPM289
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Specification
Product Description
Mouse monoclonal antibody raised against native human HLA-DRB.
Immunogen
Activated human peripheral blood mononuclear cells.
Host
Mouse
Theoretical MW (kDa)
~28
Reactivity
Human
Specificity
This monoclonal antibody reacts with the beta-chain of HLA-DR antigen, a member of MHC class II molecules. It does not cross react with HLA-DP and HLA-DQ. The L243 antibody recognizes a different epitope than the HLA-DRB monoclonal antibody, clone SPM289, and these antibodies do not cross-block binding to each other's respective epitopes. HLA-DR is a heterodimeric cell surface glycoprotein comprised of a 36 kDa alpha (heavy) chain and a 28 kDa beta (light) chain. It is expressed on B cells, activated T cells, monocytes/macrophages, dendritic cells and other non-professional APCs. In conjunction with the CD3/TCR complex and CD4 molecules, HLA-DR is critical for efficient peptide presentation to CD4+ T cells. It is an excellent histiocytic marker in paraffin sections producing intense staining. True histiocytic neoplasms are similarly positive. HLA-DR antigens also occur on a variety of epithelial cells and their corresponding neoplastic counterparts.
Form
Liquid
Purification
Protein A/G purification
Isotype
IgG2b, kappa
Recommend Usage
Flow Cytometry (0.5-1 ug/106 cells in 0.1 mL)
Immunofluorescence (0.5-1 ug/mL)
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) (0.25-0.5 ug/mL)
Western Blot (0.5-1 ug/mL)
The optimal working dilution should be determined by the end user.Storage Buffer
In 10 mM PBS (0.05% BSA, 0.05% sodium azide).
Storage Instruction
Store at 4°C.
Note
This product contains sodium azide: a POISONOUS AND HAZARDOUS SUBSTANCE which should be handled by trained staff only.
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Applications
Western Blot
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections)
Immunohistochemical staining (Formalin-fixed paraffin-embedded sections) of human tonsil with HLA-DRB monoclonal antibody, clone SPM289 (Cat # MAB13079).Immunofluorescence
Flow Cytometry
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Gene Info — HLA-DRB1
Entrez GeneID
3123Protein Accession#
P01911Gene Name
HLA-DRB1
Gene Alias
DRB1, FLJ76359, HLA-DR1B, HLA-DRB, HLA-DRB1*, SS1
Gene Description
major histocompatibility complex, class II, DR beta 1
Gene Ontology
HyperlinkGene Summary
HLA-DRB1 belongs to the HLA class II beta chain paralogs. The class II molecule is a heterodimer consisting of an alpha (DRA) and a beta chain (DRB), both anchored in the membrane. It plays a central role in the immune system by presenting peptides derived from extracellular proteins. Class II molecules are expressed in antigen presenting cells (APC: B lymphocytes, dendritic cells, macrophages). The beta chain is approximately 26-28 kDa. It is encoded by 6 exons. Exon one encodes the leader peptide; exons 2 and 3 encode the two extracellular domains; exon 4 encodes the transmembrane domain; and exon 5 encodes the cytoplasmic tail. Within the DR molecule the beta chain contains all the polymorphisms specifying the peptide binding specificities. Hundreds of DRB1 alleles have been described and typing for these polymorphisms is routinely done for bone marrow and kidney transplantation. DRB1 is expressed at a level five times higher than its paralogs DRB3, DRB4 and DRB5. DRB1 is present in all individuals. Allelic variants of DRB1 are linked with either none or one of the genes DRB3, DRB4 and DRB5. There are 4 related pseudogenes: DRB2, DRB6, DRB7, DRB8 and DRB9. [provided by RefSeq
Other Designations
HLA class II antigen beta chain|HLA class II histocompatibility antigen, DR-1 beta chain|HLA-DR-beta 1|MHC class II HLA-DR beta 1 chain|MHC class II HLA-DR-beta cell surface glycoprotein|MHC class II antigen HLA-DR13|human leucocyte antigen DRB1|leucocyte
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