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R718 Mouse Anti-Rat CD161a
Product Details
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BD OptiBuild™
CD161/Cd161; CD161a, Klrb1a, Nkrp1a/NKR-P1A; CD161b, Klrb1b, Nkrp1b/NKR-P1B
Rat (Tested in Development)
Mouse IgG1, κ
Not reported
Flow cytometry (Qualified)
0.2 mg/ml
Aqueous buffered solution containing ≤0.09% sodium azide.

Preparation And Storage

Store undiluted at 4°C and protected from prolonged exposure to light. Do not freeze. The monoclonal antibody was purified from tissue culture supernatant or ascites by affinity chromatography. The antibody was conjugated to the dye under optimum conditions that minimize unconjugated dye and antibody.

Recommended Assay Procedures

BD™ CompBeads can be used as surrogates to assess fluorescence spillover (Compensation). When fluorochrome conjugated antibodies are bound to BD CompBeads, they have spectral properties very similar to cells. However, for some fluorochromes there can be small differences in spectral emissions compared to cells, resulting in spillover values that differ when compared to biological controls. It is strongly recommended that when using a reagent for the first time, users compare the spillover on cells and BD CompBead to ensure that BD CompBeads are appropriate for your specific cellular application.

Product Notices

  1. Researchers should determine the optimal concentration of this reagent for their individual applications.
  2. The production process underwent stringent testing and validation to assure that it generates a high-quality conjugate with consistent performance and specific binding activity. However, verification testing has not been performed on all conjugate lots.
  3. An isotype control should be used at the same concentration as the antibody of interest.
  4. Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.
  5. Alexa Fluor® is a registered trademark of Life Technologies Corporation.
  6. Please refer to to access safety data sheets (SDS).
  7. Please refer to for technical protocols.
  8. This product is provided under an Agreement between BIOTIUM and BD Biosciences. This product, and only in the amount purchased by buyer, may be used solely for buyer’s own internal research, in a manner consistent with the accompanying product literature. No other right to use, sell or otherwise transfer (a) this product, or (b) its components is hereby granted expressly, by implication or by estoppel. This product is for research use only. Diagnostic uses require a separate license from Biotium, Inc. For information on purchasing a license to this product including for purposes other than research, contact Biotium, Inc., 3159 Corporate Place, Hayward, CA 94545, Tel: (510) 265-1027. Fax: (510) 265-1352. Email:
752285 Rev. 1
Antibody Details
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The 10/78 monoclonal antibody recognizes the rat CD161 proteins, CD161a (also known as, Klrb1a, or Nkrp1a/NKR-P1A), and CD161b (Klrb1b, Nkrp1b/NKR-P1B). These type II transmembrane glycoproteins have an extracellular C-type lectin domain and thus belong to the C-type lectin superfamily. These CD161 proteins form ~ 60 kDa homodimers that are expressed on natural killer cells and subsets of T lymphocytes, activated monocytes, and dendritic cells. The 10/78 antibody competes with the previously-described 3.2.3 antibody for binding to these CD161 proteins. CD161 molecules are C-type lectin-like receptors that can either activate (CD161a) or inhibit (CD161b) effector leucocyte responses, eg, cytotoxicity or cytokine production, against target cells which express C-type lectin-like related (Clr) molecules. Although several members of the Klrb1 gene family have been identified in the mouse and rat, only a single human KLRB1 homolog has been discovered.

The antibody was conjugated to BD Horizon Red 718, which has been developed exclusively for BD Biosciences as a better alternative to Alexa Fluor® 700. BD Horizon Red 718 can be excited by the red laser (628 – 640 nm) and, with an Em Max around 718 nm, it can be detected using a 730/45 nm filter. Due to similar excitation and emission properties, we do not recommend using R718 in combination with APC-R700 or Alexa Fluor® 700.

752285 Rev. 1
Format Details
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The BD Horizon™ Red 718 (R718) Dye is part of the BD red family of dyes. It is a small organic fluorochrome with an excitation maximum (Ex Max) at 695-nm and an emission maximum (Em Max) at 718-nm. Driven by BD innovation, R718 is designed to be excited by the red laser (627–640-nm) and detected using an optical filter centered near 720-nm (e.g., a 720/40-nm bandpass filter). R718 is a brighter alternative to Alexa Fluor™ 700. R718 is also a bright small molecule alternative to APC-R700 with lower spread into the APC detector. Please ensure that your instrument’s configurations (lasers and optical filters) are appropriate for this dye.
Red 627-640 nm
695 nm
718 nm
752285 Rev.1
Citations & References
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Development References (14)

  1. Bezouska K, Vlahas G, Horvath O, et al. Rat natural killer cell antigen, NKR-P1, related to C-type animal lectins is a carbohydrate-binding protein. J Biol Chem. 1994; 269(24):16945-16952. (Biology). View Reference
  2. Bezouska K, Yuen CT, O'Brien J, et al. Oligosaccharide ligands for NKR-P1 protein activate NK cells and cytotoxicity. Nature. 1994; 372(6502):150-157. (Biology). View Reference
  3. Chambers, W.H., Vujanovic, N.L, et al. Monoclonal antibody to a triggering structure expressed on rat natural killer cells and adherent lymphokine-activated killer cells. J Exp Med. 1989; 169:1373-1389. (Biology). View Reference
  4. Fujimura T, Yang XF, Soriano R, Ogawa T, Kobayashi M, Jiang H. Cellular surface molecular and cytokine gene expression in rat heart allografts under optimal doses of cyclosporine and FK 506. Transplant Proc. 1998; 30(4):1023-1026. (Clone-specific: Immunohistochemistry). View Reference
  5. Josien R, Heslan M, Soulillou JP, Cuturi MC. Rat spleen dendritic cells express natural killer cell receptor protein 1 (NKR-P1) and have cytotoxic activity to select targets via a Ca2+-dependent mechanism. J Exp Med. 1997; 186(3):467-472. (Biology). View Reference
  6. Kirkham CL, Carlyle JR. Complexity and Diversity of the NKR-P1:Clr (Klrb1:Clec2) Recognition Systems. Front Biosci. 2014; 5(5):1-16. (Clone-specific). View Reference
  7. Kraus E, Lambracht D, Wonigeit K, Hunig T. Negative regulation of rat natural killer cell activity by major histocompatibility complex class I recognition. Eur J Immunol. 1996; 26(11):2582-2586. (Clone-specific: Flow cytometry, Immunoprecipitation). View Reference
  8. Lanier LL. Natural killer cells: from no receptors to too many. Immunity. 1997; 6(4):371-378. (Biology). View Reference
  9. Li J, Rabinovich BA, Hurren R, Shannon J, Miller RG. Expression cloning and function of the rat NK activating and inhibitory receptors NKR-P1A and -P1B. Int Immunol. 2003; 15(3):411-416. (Clone-specific: Activation, Calcium Flux, Cytotoxicity, Flow cytometry, Functional assay, Inhibition). View Reference
  10. Ryan JC, Niemi EC, Nakamura MC, Seaman WE. NKR-P1A is a target-specific receptor that activates natural killer cell cytotoxicity. J Exp Med. 1995; 181(5):1911-1915. (Biology). View Reference
  11. Scriba A, Grau V, Steiniger B. Phenotype of rat monocytes during acute kidney allograft rejection: increased expression of NKR-P1 and reduction of CD43. Scand J Immunol. 1998; 47(4):332-342. (Biology). View Reference
  12. Scriba A, Schneider M, Grau V, van der Meide PH, Steiniger B. Rat monocytes up-regulate NKR-P1A and down-modulate CD4 and CD43 during activation in vivo: monocyte subpopulations in normal and IFN-gamma-treated rats. J Leukoc Biol. 1997; 62(6):741-752. (Biology). View Reference
  13. Trinite B, Voisine C, Yagita H, Josien R. A subset of cytolytic dendritic cells in rat. J Immunol. 2000; 165(8):4202-4208. (Biology). View Reference
  14. Webster GA, Bowles MJ, Karim MS, Wood RF, Pockley AG. Activation antigen expression on peripheral blood neutrophils following rat small bowel transplantation. NKR-P1 is a novel antigen preferentially expressed during allograft rejection. Transplantation. 1994; 58(6):707-712. (Biology). View Reference
View All (14) View Less
752285 Rev. 1

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Global - Refer to manufacturer's instructions for use and related User Manuals and Technical data sheets before using this products as described

Comparisons, where applicable, are made against older BD Technology, manual methods or are general performance claims.  Comparisons are not made against non-BD technologies, unless otherwise noted.

For Research Use Only. Not for use in diagnostic or therapeutic procedures.