- 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

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Human PBMCs stained with 154Sm-anti-CD45 (HI30) and 174Yb-anti-HLA-DR (L243). Data provided by DVS Sciences.
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
- Verified Reactivity
- Human, Cynomolgus, Rhesus
- Reported Reactivity
- African Green, Baboon, Chimpanzee, Dog, Common Marmoset, Squirrel Monkey, Cotton-topped Tamarin
- Antibody Type
- Monoclonal
- Host Species
- Mouse
- Formulation
- Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide and EDTA.
- Preparation
- The antibody was purified by affinity chromatography.
- Concentration
- 1.0 mg/ml
- Storage & Handling
- The antibody solution should be stored undiluted between 2°C and 8°C.
- Application
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FC - Quality tested
CyTOF® - Verified - Recommended Usage
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This product is suitable for use with the Maxpar® Metal Labeling Kits. For metal labeling using Maxpar® Ready antibodies, proceed directly to the step to Partially Reduce the Antibody by adding 100 µl of Maxpar® Ready antibody to 100 µl of 4 mM TCEP-R in a 50 kDa filter and continue with the protocol. Always refer to the latest version of Maxpar® User Guide when conjugating Maxpar® Ready antibodies.
- Application Notes
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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). - Additional Product Notes
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Maxpar® is a registered trademark of Standard BioTools Inc.
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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
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- RRID
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AB_2562826 (BioLegend Cat. No. 307651)
Antigen Details
- Structure
- Ig superfamily, MHC class II, heterodimeric transmembrane protein, 36 kD heavy and 27 kD light chain
- Distribution
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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
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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
Related FAQs
- Can I obtain CyTOF data related to your Maxpar® Ready antibody clones?
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We do not test our antibodies by mass cytometry or on a CyTOF machine in-house. The data displayed on our website is provided by Fluidigm®. Please contact Fluidigm® directly for additional data and further details.
- Can I use Maxpar® Ready format clones for flow cytometry staining?
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We have not tested the Maxpar® Ready antibodies formulated in solution containing EDTA for flow cytometry staining. While it is likely that this will work in majority of the situations, it is best to use the non-EDTA formulated version of the same clone for flow cytometry testing. The presence of EDTA in some situations might negatively affect staining.
- I am having difficulty observing a signal after conjugating a metal tag to your Maxpar® antibody. Please help troubleshoot.
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We only supply the antibody and not test that in house. Please contact Fluidigm® directly for troubleshooting advice: http://techsupport.fluidigm.com/
- Is there a difference between buffer formulations related to Maxpar® Ready and purified format antibodies?
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The Maxpar® Ready format antibody clones are formulated in Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide and EDTA. The regular purified format clones are formulated in solution that does not contain any EDTA. Both formulations are however without any extra carrier proteins.
Other Formats
View All HLA-DR Reagents Request Custom ConjugationCustomers Also Purchased
Compare Data Across All Formats
This data display is provided for general comparisons between formats.
Your actual data may vary due to variations in samples, target cells, instruments and their settings, staining conditions, and other factors.
If you need assistance with selecting the best format contact our expert technical support team.
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APC anti-human HLA-DR
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FITC anti-human HLA-DR
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PE anti-human HLA-DR
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PE/Cyanine5 anti-human HLA-DR
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Purified anti-human HLA-DR
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Biotin anti-human HLA-DR
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PE/Cyanine7 anti-human HLA-DR
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APC/Cyanine7 anti-human HLA-DR
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Alexa Fluor® 488 anti-human HLA-DR
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Alexa Fluor® 647 anti-human HLA-DR
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Pacific Blue™ anti-human HLA-DR
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Alexa Fluor® 700 anti-human HLA-DR
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PerCP anti-human HLA-DR
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PerCP/Cyanine5.5 anti-human HLA-DR
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Brilliant Violet 605™ anti-human HLA-DR
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Brilliant Violet 421™ anti-human HLA-DR
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Brilliant Violet 570™ anti-human HLA-DR
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Brilliant Violet 711™ anti-human HLA-DR
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Brilliant Violet 785™ anti-human HLA-DR
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Brilliant Violet 510™ anti-human HLA-DR
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Ultra-LEAF™ Purified anti-human HLA-DR
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Brilliant Violet 650™ anti-human HLA-DR
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Purified anti-human HLA-DR (Maxpar® Ready)
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PE/Dazzle™ 594 anti-human HLA-DR
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FITC anti-human HLA-DR
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APC/Fire™ 750 anti-human HLA-DR
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Pacific Blue™ anti-human HLA-DR
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APC anti-human HLA-DR
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PE/Dazzle™ 594 anti-human HLA-DR
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PE/Cyanine7 anti-human HLA-DR
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TotalSeq™-A0159 anti-human HLA-DR
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TotalSeq™-B0159 anti-human HLA-DR
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TotalSeq™-C0159 anti-human HLA-DR
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Brilliant Violet 750™ anti-human HLA-DR
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APC/Fire™ 750 anti-human HLA-DR
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PerCP/Cyanine5.5 anti-human HLA-DR
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APC/Fire™ 810 anti-human HLA-DR
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PE/Fire™ 640 anti-human HLA-DR
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PE anti-human HLA-DR
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Spark Violet™ 538 anti-human HLA-DR Antibody
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KIRAVIA Blue 520™ anti-human HLA-DR
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TotalSeq™-D0159 anti-human HLA-DR
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PE/Fire™ 810 anti-human HLA-DR
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GMP PE/Dazzle™ 594 anti-human HLA-DR
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Spark Violet™ 423 anti-human HLA-DR
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PerCP anti-human HLA-DR
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GMP FITC anti-human HLA-DR
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GMP APC anti-human HLA-DR
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GMP PE/Cyanine7 anti-human HLA-DR
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GMP Pacific Blue™ anti-human HLA-DR
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GMP APC/Fire™ 750 anti-human HLA-DR
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Spark Violet™ 500 anti-human HLA-DR
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GMP PE anti-human HLA-DR
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