- Clone
- L243 (See other available formats)
- Regulatory Status
- RUO
- Other Names
- Major Histocompatibility Class II, MHC class II
- Isotype
- Mouse IgG2a, κ
- Ave. Rating
- Submit a Review
- Product Citations
- publications
HLA-DR is a heterodimeric cell surface glycoprotein comprised of a 36 kD α (heavy) chain and a 27 kD β (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.
Product DetailsProduct Details
- Reactivity
- Human,Cynomolgus,Rhesus
- Antibody Type
- Monoclonal
- Host Species
- Mouse
- Formulation
-
test size: Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide and BSA (origin USA).
µg sizes: Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide. - Preparation
- The antibody was purified by affinity chromatography, and conjugated with Pacific Blue™ under optimal conditions.
- Concentration
- µg sizes: 0.5 mg/mLtest sizes: lot-specific (to obtain lot-specific concentration and expiration, please enter the lot number in our Certificate of Analysis online tool.)
- Storage & Handling
- The HLA-DR antibody solution should be stored undiluted between 2°C and 8°C, and protected from prolonged exposure to light. Do not freeze.
- Application
-
FC - Quality tested
- Recommended Usage
-
Each lot of this antibody is quality control tested by immunofluorescent staining with flow cytometric analysis.
For test size, the suggested use of this reagent for immunofluorescent staining is 5 µl per 106 cells in 100 µl volume.
For µg sizes, the suggested use of this reagent for immunofluorescent staining is ≤0.5 µg per 106 cells in 100 µl volume.
It is recommended that the reagent be titrated for optimal performance for each application.
* Pacific Blue™ has a maximum emission of 455 nm when it is excited at 405 nm. Prior to using Pacific Blue™ conjugate for flow cytometric analysis, please verify your flow cytometer's capability of exciting and detecting the fluorochrome.
Alexa Fluor® and Pacific Blue™ are trademarks of Life Technologies Corporation.
View full statement regarding label licenses - Excitation Laser
-
Violet Laser (405 nm)
- Application Notes
-
The L243 monoclonal antibody reacts with the HLA-DR antigen, a member of MHC class II molecules. It does not cross react with HLA-DP and HLA-DQ. Clone L243 binds a conformational epitope on HLA-DRa which depends on the correct folding of the aß heterodimer.19
Additional reported applications (for the relevant formats) include: immunoprecipitation8, Western blotting8, in vitro blocking of mixed lymphocyte reactions9,10, depeletion of MHC class II cells7, immunohistochemical staining of acetone-fixed frozen sections4,5, and spatial biology (IBEX)21,22. For sensitive functional assays, we recommend using the Ultra-LEAF™ purified antibody (Endotoxin < 0.01 EU/µg, Azide-Free, 0.2 µm filtered) (Cat. No. 307648, 307665 - 307669). -
Application References
(PubMed link indicates BioLegend citation) -
- Brodsky F. 1984. Immunogenetics 19:179.
- Robbins P, et al. 1987. Human Immunol. 18:301.
- Stites D, et al. 1986. Clin. Immunol. Immunopathol. 38:161.
- Warnke R, et al. 1980. J. Histochem. Cytochem. 28:771. (IHC)
- Engleman E, et al. 1981. P. Natl. Acad. Sci. USA 78:1791. (IHC)
- Zipf T, et al. 1981. Cancer Res. 41:4786.
- Goodier M, et al. 2000. J. Immunol. 165:139. (Depletion)
- Esser M, et al. 2001. J. Virol. 75:6173. (IP, WB)
- Kalka-Moll WM, et al. 2002. J. Immunol. 169:6149. (Block)
- Wang RF, et al. 1999. Science 284:1351. (Block)
- Zaba LC, et al. 2007. J. Exp. Med. 204:3183. PubMed
- Fujita H, et al. 2009. P. Natl. Acad. Sci. USA 106:21795. PubMed
- Charles N, et al. 2010. Nat. Med. 16:701. (FC) PubMed
- Goncalves RM, et al. 2010. Infect. Immun. 78:4763. PubMed
- Yoshino N, et al. 2000. Exp. Anim. (Tokyo) 49:97. (FC)
- Kim WK, et al. 2006. Am. J. Pathol. 168:822. (FC)
- Stein R, et al. 2011. Leuk. Lymphoma 52:273.
- Galkowska H, et al. 1996. Vet. Immunol. Immunopathol. 53:329.
- Moro M, et al. 2005. BMC Immunol. 6:24.
- Lauterbach N, et al. 2014. Mol Immunol. 59:19. PubMed
- Radtke AJ, et al. 2020. Proc Natl Acad Sci USA. 117:33455-33465. (SB) PubMed
- Radtke AJ, et al. 2022. Nat Protoc. 17:378-401. (SB) PubMed
- Product Citations
- RRID
-
AB_493664 (BioLegend Cat. No. 307623)
AB_493665 (BioLegend Cat. No. 307624)
AB_1595444 (BioLegend Cat. No. 307633)
Antigen Details
- Structure
- Ig superfamily, MHC class II, heterodimeric transmembrane protein, 36 kD heavy and 27 kD light chain
- Distribution
-
B cells, activated T cells, monocytes/macrophages, dendritic cells, other APCs
- Function
- Peptide presentation
- Ligand/Receptor
- CD3/TCR, CD4
- Cell Type
- Antigen-presenting cells, B cells, Dendritic cells, Macrophages, Monocytes, T cells, Tregs
- Biology Area
- Immunology, Innate Immunity
- Molecular Family
- MHC Antigens
- Antigen References
-
1. Levacher M, et al. 1990. Clin. Exp. Immunol. 81:177.
2. Terstappen L, et al. 1990. J. Leukocyte Biol. 48:138.
3. Edwards JA, et al. 1986. J. Immunol. 137:490.
4. van Es A, et al. 1984. Transplantation 37:65.
5. O'Doherty U, et al. 1994. Immunology 82:487.
6. Thomas R, et al. 1994. J. Immunol. 153:4016.
7. Grouard G, et al. 1996. Nature 384:364. - Gene ID
- 3122 View all products for this Gene ID 3123 View all products for this Gene ID
- UniProt
- View information about HLA-DR on UniProt.org
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