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cFluor<sup>®</sup> B690 Anti-Human HLA-DR (L243)

cFluor® B690 Anti-Human HLA-DR (L243)

SKU R7-20126
Regular price


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The L243 monoclonal antibody binds to the human HLA-DR antigen, a 36-kDa alpha heavy chain and a 27-kDa beta light chain heterodimeric cell surface glycoprotein in transmembrane major histocompatibility complex 2 (MHC II) family1,2. HLA-DR, also known as human leukocyte antigen DR isotype, is present on the surface of antigen-presenting cells, including B cells, dendritic cells, macrophages, monocytes and activate T cells. MHC class II regulates the immune system by playing a critical role in binding and presenting antigen-derived peptides to peptide-MHC II-specific CD4 T cells3. The antibody was conjugated to a fluorophore and purified by affinity chromatography.


Clone:              L243

Reactivity:          Human

Format:        cFluor® B6901

Isotype:               Mouse IgG2a, κ

Tested Dilution:  5 μL / test

Application:        Flow Cytometry

Storage:               2-8°C and protected from Light. Do not freeze

Formulation:       Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide and 0.2% BSA (Origin USA)

Data Sheets:      TDS SDS



Each lot of this antibody is quality control tested using flow cytometric analysis. For flow cytometric staining, the suggested use of this reagent is 5 µL per 1 million cells in a staining volume of 100 µL. If whole blood is analyzed, then use 5 µL per 100 µL. It is recommended that users titrate the antibody to obtain the optimal result for their specific application.

Please briefly centrifuge the reagent vial before use.

Use appropriate personal protective equipment per the product safety data sheet when using this product.  


  1. Korman, A J et al. 1982. Proceedings of the National Academy of Sciences of the United States of America vol. 79,19: 6013-7
  2. Shackelford DA, et al. 1982. Immunol Rev. 66:133-87
  3. Walseng E, et al. 2008. J Biol Chem. 23;283(21):14717-27

These products are for research use only. Not intended for use in diagnostic procedures.

1cFluor® B690 is a tandem dye made with PerCP. Caution – Tandem dyes may show changes in their emission spectra with prolonged exposure to light or fixatives.

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