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Mouse Monoclonal to NK1.1 / CD161bc (mouse)

PK136 (IgG2a)

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NK1.1 / CD161bc (also known as NKRP1, Ly55c, or Ly59) is a cell surface antigen expressed on NK cells and NK-T cells of certain mouse strains, which is being used for identification or antibody-mediated depletion of these cells in the respective strains. This antigen participates in NK cell activation, including production of interferon gamma, and release of cytotoxic granules.


The mouse monoclonal antibody PK136 recognizes NK1.1 antigen (NK cell marker) expressed by some mouse strains (e.g. C57BL/6, NZB, CE, C58, Ma/My), whereas other strains (e.g. BALB/c, AKR, CBA, C3H) do not express this antigen. This antibody detects a conformational epitope on Nkrp1c and Nkrp1b gene products.

Regulatory Status


NK1-positive murine splenic and bone marrow cells

Species Reactivity:

  • Mouse

Negative Species:


  • Flow Cytometry
  • Immunoprecipitation
  • Immunohistochemistry (frozen sections)
  • Functional Application
    in vivo depletion of NK cells and NK-T cells
Usage note:
Indicated dilutions are recommended starting points for use of this product. Working concentrations should be determined by the investigator.

Product Specific References

  • *Laffont S, Seillet C, Ortaldo J, Coudert JD, Guéry JC: Natural killer cells recruited into lymph nodes inhibit alloreactive T-cell activation through perforin-mediated killing of donor allogeneic dendritic cells. Blood. 2008 Aug 1;112(3):661-71 [Abstract] [Full Text]
  • *Kulesza J, Hoser G, Wasilewska D, Kawiak J: NK cell depletion and recovery in SCID mice treated with anti-NK1.1 antibody. Folia Histochem Cytobiol. 2006;44(2):93-6. [Abstract]
  • *Fang M, Lanier LL, Sigal LJ: A role for NKG2D in NK cell-mediated resistance to poxvirus disease. PLoS Pathog. 2008 Feb 8;4(2):e30. [Abstract] [Full Text]
  • *Takahashi S, Kawamura T, Kanda Y, Taniguchi T, Nishizawa T, Iiai T, Hatakeyama K, Abo T: Activation of CD1d-independent NK1.1+ T cells in the large intestine by Lactobacilli. Immunol Lett. 2006 Jan 15;102(1):74-8. [Abstract]
  • *Wang M, Ellison CA, Gartner JG, HayGlass KT: Natural killer cell depletion fails to influence initial CD4 T cell commitment in vivo in exogenous antigen-stimulated cytokine and antibody responses. J Immunol. 1998 Feb 1;160(3):1098-105. [Abstract] [Full Text]
  • *Joncker NT, Shifrin N, Delebecque F, Raulet DH: Mature natural killer cells reset their responsiveness when exposed to an altered MHC environment. J Exp Med. 2010 Sep 27;207(10):2065-72. [Abstract] [Full Text]
  • *Carroll JL, Nielsen LL, Pruett SB, Mathis JM: The role of natural killer cells in adenovirus-mediated p53 gene therapy. Mol Cancer Ther. 2001 Nov;1(1):49-60. [Abstract] [Full Text]
  • *Símová J, Bubeník J, Bieblová J, Jandlová T: The role of NK1.1+ cells in the protection against MHC class I+ HPV16-associated tumours. Folia Biol (Praha). 2004;50(6):200-2. [Abstract]
  • *GeurtsvanKessel CH, Bergen IM, Muskens F, Boon L, Hoogsteden HC, Osterhaus AD, Rimmelzwaan GF, Lambrecht BN: Both conventional and interferon killer dendritic cells have antigen-presenting capacity during influenza virus infection. PLoS One. 2009 Sep 28;4(9):e7187. [Abstract]
  • *Carlyle JR, Mesci A, Ljutic B, Belanger S, Tai LH, Rousselle E, Troke AD, Proteau MF, Makrigiannis AP: Molecular and genetic basis for strain-dependent NK1.1 alloreactivity of mouse NK cells. J Immunol. 2006 Jun 15;176(12):7511-24. [Abstract]
  • For research use only. Not for drug, diagnostic or other use.

    Example Data

    PK136 PE

    Fig. 1. Surface staining of murine splenocytes with anti-NK1.1 (PK136) PE.

    Unless indicated otherwise, all products are For Research Use Only and not for diagnostic or therapeutic use. Not for resale or transfer either as a stand-alone product or as a component of another product without written consent of EXBIO. EXBIO will not be held responsible for patent infringement or other violations that may occur with the use of our products. All orders are accepted subject to EXBIO´s term and conditions which are available at
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