

| Catalog No. | HM812127 |
|---|---|
| Species reactivity | Human |
| Applications | FCM |
| Host species | Mouse |
| Isotype | IgG1, kappa |
| Clone ID | 1D09C3 |
| Conjugation | PE |
| Clonality | Monoclonal |
| Target | HLA-DRA1, MHC class II antigen DRA, HLA-DRA, HLA class II histocompatibility antigen, DR alpha chain |
| Endotoxin level | Please contact with the lab for this information. |
| Accession | P01903 |
| Form | Liquid |
| Storage buffer | 0.01M PBS, pH 7.4, 0.2% BSA, 0.05% Proclin 300. Please refer to the specific buffer information in the hardcopy of datasheet or the lot-specific COA. |
| Stability and Storage | Store at 4°C for 12 months. Protect from light. Do not freeze. |
| Background | HLA class II histocompatibility antigen, DR alpha chain (HLA-DRA) is a ~28 kDa protein. An alpha chain of antigen-presenting major histocompatibility complex class II (MHCII) molecule. In complex with the beta chain HLA-DRB, displays antigenic peptides on professional antigen presenting cells (APCs) for recognition by alpha-beta T cell receptor (TCR) on HLA-DR-restricted CD4-positive T cells. This guides antigen-specific T-helper effector functions, both antibody-mediated immune response and macrophage activation, to ultimately eliminate the infectious agents and transformed cells. Typically presents extracellular peptide antigens of 10 to 30 amino acids that arise from proteolysis of endocytosed antigens in lysosomes. In the tumor microenvironment, presents antigenic peptides that are primarily generated in tumor-resident APCs likely via phagocytosis of apoptotic tumor cells or macropinocytosis of secreted tumor proteins. 1. Shams, H. et al. (2004) Journal of immunology (Baltimore, Md. : 1950) 173, 1966-77. PMID: 15265931 2. Röhn, TA. et al. (2004) Nature immunology 5, 909-18. PMID: 15322540 3. Deng, L. et al. (2007) Nature immunology 8, 398-408. PMID: 17334368 4. Kwok, WW. et al. (2012) Journal of immunology (Baltimore, Md. : 1950) 188, 2537-44. PMID: 22327072 5. Scally, SW. et al. (2013) The Journal of experimental medicine 210, 2569-82. PMID: 24190431 6. Muehling, LM. et al. (2016) Journal of immunology (Baltimore, Md. : 1950) 197, 3214-3224. PMID: 27591323 7. Galperin, M. et al. (2018) Science immunology 3. PMID: 29884618 8. Abelin, JG. et al. (2019) Immunity 51, 766-779.e17. PMID: 31495665 9. Stern, LJ. et al. (1994) Nature 368, 215-21. PMID: 8145819 10. Kropshofer, H. et al. (1997) Immunity 6, 293-302. PMID: 9075930 |
| Note | For flow cytometric staining, the suggested use of this reagent is 0.5 µg per million cells in 100 µL volume. It is recommended that the reagent be titrated for optimal performance for each application. For research use only. |

Flow-cytometry using PE anti-human HLA-DRA antibody. Daudi cells were stained with an irrelevant antibody (Green Histogram) or a PE anti-human HLA-DRA antibody monoclonal antibody (Catalog # HM812127, Red Histogram) at a concentration of 5 µg/ml for 30 mins at RT. After washing, cells analysed on a NovoCyte Flow Cytometer.




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