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Key Product Details

Species Reactivity



Binding Inhibition, CyTOF-ready, Flow Cytometry



Antibody Source

Monoclonal Mouse IgG1 Clone # 683409

Product Summary for Human CLEC9a Antibody


Mouse myeloma cell line NS0-derived recombinant human CLEC9a
Accession # Q6UXN8


Detects human CLEC9a in direct ELISAs. In direct ELISAs, no cross-reactivity with recombinant human (rh) CLEC1, 2, 2A, 3B, 10A, 12B, 14A, rhCD302/CLEC13a, rhMICL, or recombinant mouse CLEC9a is observed.







Applications for Human CLEC9a Antibody

Recommended Usage


Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.

Flow Cytometry

2.5 µg/106 cells
Sample: Human HEK293 cells transfected with human CLEC9a.

Binding Inhibition

The binding of Recombinant Human CLEC9a Fc Chimera (Catalog # 6049-CL, 100 ng/mL) to a ligand expressed in Fas Ligand-treated A20 mouse B cell lymphoma cell line was maximally inhibited (>90%) by 1 µg/mL of the antibody, as detected by flow cytometry.

Please Note: Optimal dilutions of this antibody should be experimentally determined.

Formulation, Preparation, and Storage


Protein A or G purified from hybridoma culture supernatant

Endotoxin Level

<0.10 EU per 1 μg of the antibody by the LAL method.


Sterile PBS to a final concentration of 0.5 mg/mL. For liquid material, refer to CoA for concentration.

Reconstitution Buffer Available:
Size / Price


Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.


The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C

Stability & Storage

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: CLEC9a

CLEC9a (C-type lectin domain family 9 member A), also known as DNGR-1, is a type II transmembrane glycoprotein member of the C‑type lectin superfamily (1, 2). Mature human CLEC9a consists of a 35 amino acid (aa) cytoplasmic domain with an ITAM-like motif, a 21 aa transmembrane segment, and a 185 extracellular domain (ECD) that contains a stalk region and one C-type lectin domain (CTLD) (3‑5). Within the ECD, human CLEC9a shares 57% aa sequence identity with mouse and rat CLEC9a. Although the CTLD of CLEC9a structurally resembles that of other C-type lectins, it lacks the conserved residues that typically mediate calcium and carbohydrate binding. CLEC9a is expressed as a disulfide-linked homodimer of approximately 50 kDa N-glycosylated subunits (3, 5). Human CLEC9a expression is restricted to a subpopulation of BDCA-3+ conventional dendritic cells (cDC) and CD16- monocytes (3‑5). BDCA-3+ cDC are analagous to mouse CD8+ cDC which are specialized in antigenic cross-presentation in complex with MHC class I molecules (6). In mouse, CLEC9a is additionally expressed on plasmacytoid dendritic cells (4, 5). CLEC9a ligation enhances antigen uptake and processing, leading to presentation on MHC class I and cytotoxic T cell (CTL) priming (3‑5). In mouse, CLEC9a recognizes normally intracellular determinant(s) of necrotic cells and mediates their uptake by the dendritic cell (7). The subsequent antigenic cross-presentation to CTL is important for clearing necrotic cellular debris (7). CLEC9a signaling triggers activation of the tyrosine kinase Syk (3, 7).


  1. Huysamen, C. and G.D. Brown (2009) FEMS Microbiol. Lett. 290:121.
  2. Geijtenbeek, T.B.H. et al. (2004) Annu. Rev. Immunol. 22:33.
  3. Huysamen, C. et al. (2008) J. Biol. Chem. 283:16693.
  4. Caminschi, I. et al. (2008) Blood 112:3264.
  5. Sancho, D. et al. (2008) J. Clin. Invest. 118:2098.
  6. Dudziak, D. et al. (2007) Science 315:107.
  7. Sancho, D. et al. (2009) Nature 458:899.

Long Name

C-type Lectin-like Receptor 9

Alternate Names

CD370, DNGR1

Entrez Gene IDs

283420 (Human); 232414 (Mouse)

Gene Symbol



Additional CLEC9a Products

Product Documents for Human CLEC9a Antibody

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot number in the search box below.

Note: Certificate of Analysis not available for kit components.

Product Specific Notices for Human CLEC9a Antibody

For research use only