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Multicolor flow cytometric analysis of NK-1.1 expression on viable Mouse splenic leucocytes. C57BL/6 Mouse splenocytes were preincubated with Purified Rat Anti-Mouse CD16/CD32 antibody (Mouse BD Fc Block™) [Cat. No. 553141/553142]. The cells were then stained with APC Hamster Anti-Mouse CD3e antibody (Cat. No. 553066/561826) and with either BD Horizon™ RB780 Mouse IgG2a, κ Isotype Control (Cat. No. 568740; Left Plot) or BD Horizon™ RB780 Mouse Anti-Mouse NK-1.1 antibody (Cat. No. 569231/569232; Right Plot) at 1.0 µg/test. BD Via-Probe™ Cell Viability 7-AAD Solution (Cat. No. 555815/555816) was added to cells right before analysis. The bivariate pseudocolor density plot showing the correlated expression of NK1.1 (or Ig Isotype control staining) versus CD3e was derived from gated events with the forward and side light-scatter characteristics of viable (7-AAD-negative) leucocytes. Flow cytometry and data analysis were performed using a BD X-20 LSRFortessa™ Cell Analyzer System and FlowJo™ software. Data shown on this Technical Data Sheet are not lot specific.
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BD Horizon™ RB780 Mouse Anti-Mouse NK-1.1
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In the mouse, at least three members of the Klrb (Killer cell lectin-like receptor, subfamily b; formerly NKR-P1) gene family have been identified (Klrb1a/NKR-P1A, Klrb1b/NKR-P1B, and Klrb1c/NKR-P1C); but in the human gene family, a single homologue has been designated KLRB1, NKR-P1A, or CD161. The KLRB1/NKR-P1 family of proteins are type-II-transmembrane C-type lectin receptors. KLRB1C/NKR-P1C activates NK-cell cytotoxicity, while KLRB1B/NKR-P1B functions as an inhibitory receptor. KLRB1B/NKR-P1B protein has intracellular Immunoreceptor Tyrosine-based Inhibitory Motif (ITIM), while KLRB1C/NKR-P1C lacks ITIM and activates via association with Fc Receptor γ chain. Strikingly, KLRB1B/NKR-P1B and KLRB1C/NKR-P1C share 96% amino acid sequence identity in their extracellular C-type lectin domains. The PK136 antibody reacts with the NK-1.1 surface antigen (CD161c) encoded by the Klrb1c/NKR-P1C gene expressed on natural killer (NK) cells in selected strains of mice (eg, C57BL, FVB/N, NZB, but not A, AKR, BALB/c, CBA/J, C3H, C57BR, C58, DBA/1, DBA/2, NOD, SJL, 129) and the CD161b antigen encoded by the Klrb1b/NKR-P1B gene expressed only on Swiss NIH and SJL mice, but not on C57BL/6. Expression of KLRB1C/NKR-P1C protein is correlated with the ability to lyse tumor cells in vitro and to mediate rejection of bone marrow allografts. The NK-1.1 marker is useful in defining NK cells; however, the antigen is also expressed on a rare, specialized population of T lymphocytes (NK-T cells) and some cultured monocytes. Plate-bound PK136 mAb, in combination with low concentrations of IL-2, induces proliferation of a subset of NK cells.

Development References (11)
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Arase N, Arase H, Park SY, Ohno H, Ra C, Saito T. Association with FcRgamma is essential for activation signal through NKR-P1 (CD161) in natural killer (NK) cells and NK1.1+ T cells. J Exp Med. 1997; 186(12):1957-1963. (Clone-specific: Cytotoxicity, Flow cytometry, Fluorescence activated cell sorting, Functional assay, Immunofluorescence, Immunoprecipitation, Stimulation). View Reference
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Carlyle JR, Martin A, Mehra A, Attisano L, Tsui FW, Zuniga-Pflucker JC. Mouse NKR-P1B, a novel NK1.1 antigen with inhibitory function. J Immunol. 1999; 162(10):5917-5923. (Clone-specific: Cytotoxicity, Flow cytometry, Immunoprecipitation, Inhibition, Stimulation). View Reference
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Giorda R, Trucco M. Mouse NKR-P1. A family of genes selectively coexpressed in adherent lymphokine-activated killer cells. J Immunol. 1991; 147(5):1701-1708. (Biology). View Reference
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Koo GC, Peppard JR. Establishment of monoclonal anti-Nk-1.1 antibody. Hybridoma. 1984; 3(3):301-303. (Immunogen: Cytotoxicity, Flow cytometry). View Reference
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Kung SK, Su RC, Shannon J, Miller RG. The NKR-P1B gene product is an inhibitory receptor on SJL/J NK cells. J Immunol. 1999; 162(10):5876-5887. (Clone-specific: Activation, Calcium Flux, Flow cytometry, Fluorescence activated cell sorting, Immunoprecipitation, Inhibition, Stimulation). View Reference
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Lanier LL. Natural killer cells: from no receptors to too many. Immunity. 1997; 6(4):371-378. (Biology). View Reference
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Reichlin A, Yokoyama WM. Natural killer cell proliferation induced by anti-NK1.1 and IL-2. Immunol Cell Biol. 1998; 76(2):143-152. (Clone-specific: Activation, Cytotoxicity, Functional assay, Stimulation). View Reference
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Sentman CL, Kumar V, Koo G, Bennett M. Effector cell expression of NK1.1, a murine natural killer cell-specific molecule, and ability of mice to reject bone marrow allografts. J Immunol. 1989; 142(6):1847-1853. (Clone-specific: Flow cytometry, Immunofluorescence). View Reference
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Vicari AP, Zlotnik A. Mouse NK1.1+ T cells: a new family of T cells. Immunol Today. 1996; 17(2):71-76. (Biology). View Reference
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Yokoyama WM, Seaman WE. The Ly-49 and NKR-P1 gene families encoding lectin-like receptors on natural killer cells: the NK gene complex. Annu Rev Immunol. 1993; 11:613-635. (Biology). View Reference
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Yu YY, Kumar V, Bennett M. Murine natural killer cells and marrow graft rejection. Annu Rev Immunol. 1992; 10:189-213. (Biology). View Reference
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