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Two-color flow cytometric analysis of NKB1 (CD158e1) expression on human peripheral blood lymphocytes. Whole blood was stained with PE Mouse Anti-Human CD56 (Cat. No. 555516) and with either BD Horizon™ R718 Mouse IgG1, κ Isotype Control (Cat. No. 566928; Left Plot) or BD Horizon™ R718 Mouse Anti-Human CD158e1 (NKB1) [Cat. No. 567046/567227; Right Plot]. The erythrocytes were lysed with BD FACS™ Lysing Solution (Cat. No. 349202). The bivariate pseudocolor density plot showing the correlated expression of CD158e1 (NKB1) [or Ig Isotype control staining] versus CD56 was derived from gated events with the forward and side-light scattering characteristics of intact lymphocytes. Flow cytometry and data analysis were performed using a BD LSRFortessa™ X-20 Cell Analyzer System and FlowJo™ software.
BD Horizon™ R718 Mouse Anti-Human CD158e1 (NKB1)
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The DX9 monoclonal antibody specifically binds to CD158e1, also known as NKB1. CD158e1 functions as a killer cell inhibitory receptor (KIR) and is encoded by KIR3DL1 (Killer cell immunoglobulin-like receptor, three domains, long cytoplasmic tail). CD158e1 is a 70 kDa glycoprotein that belongs to the Ig superfamily. It is expressed on a subset of natural killer cells and a small subset of T cells. Expression of CD158e1 has been observed to vary among individuals. KIR molecules specifically recognize a certain group of HLA class I antigens. Interaction of CD158e1 with specific HLA-B antigen on a target cell appears to inhibit cell-mediated cytotoxicity by delivering a negative signal that prevents lymphocyte activation. It is suggested that this MHC class I-KIR interaction works as a signaling mechanism that regulates NK and T-cell responses to antigenic challenge.
Development References (10)
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D'Andrea A, Chang C, Franz-Bacon K, McClanahan T, Phillips JH, Lanier LL. Molecular cloning of NKB1. A natural killer cell receptor for HLA-B allotypes. J Immunol. 1995; 155(5):2306-2310. (Biology). View Reference
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D'Andrea A, Chang C, Phillips JH, Lanier LL. Regulation of T cell lymphokine production by killer cell inhibitory receptor recognition of self HLA class I alleles. J Exp Med. 1996; 184(2):789-794. (Biology). View Reference
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Fry AM, Lanier LL, Weiss A. Phosphotyrosines in the killer cell inhibitory receptor motif of NKB1 are required for negative signaling and for association with protein tyrosine phosphatase 1C. J Exp Med. 1996; 184(1):295-300. (Biology). View Reference
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Gumperz JE, Paterson JC, Litwin V, et al. Specificity of two anti-class I HLA monoclonal antibodies that block class I recognition by the NKB1 killer cell inhibitory receptor. Tissue Antigens. 1996; 48(4):278-284. (Clone-specific: Blocking, Inhibition). View Reference
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Gumperz JE, Valiante NM, Parham P, Lanier LL, Tyan D. Heterogeneous phenotypes of expression of the NKB1 natural killer cell class I receptor among individuals of different human histocompatibility leukocyte antigens types appear genetically regulated, but not linked to major histocompatibililty complex. J Exp Med. 1996; 183(4):1817-1827. (Clone-specific: Blocking, Flow cytometry, Fluorescence activated cell sorting, Functional assay, Immunoprecipitation, Inhibition). View Reference
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Lanier LL, Peterson M, Long EO. Antibody reactivity with NK receptors expressed on transfected cells. In: Mason D. David Mason .. et al., ed. Leucocyte typing VII : white cell differentiation antigens : proceedings of the Seventh International Workshop and Conference held in Harrogate, United Kingdom. Oxford: Oxford University Press; 2002:413-414.
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Litwin V, Gumperz J, Parham P, Phillips JH, Lanier LL. NKB1: a natural killer cell receptor involved in the recognition of polymorphic HLA-B molecules. J Exp Med. 1994; 180(2):537-543. (Immunogen: Bioassay, Blocking, Flow cytometry, Immunoprecipitation, Radioimmunoassay). View Reference
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Pascal V, Vivier E, Andre P. CD158 (killer immunoglobulin-like receptors family) report. In: Mason D. David Mason .. et al., ed. Leucocyte typing VII : white cell differentiation antigens : proceedings of the Seventh International Workshop and Conference held in Harrogate, United Kingdom. Oxford: Oxford University Press; 2002:412-413.
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Sivori S, Vitale M, Bottino C, et al. CD94 functions as a natural killer cell inhibitory receptor for different HLA class I alleles: identification of the inhibitory form of CD94 by the use of novel monoclonal antibodies. Eur J Immunol. 1996; 26(10):2487-2492. (Biology). View Reference
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Wagtmann N, Rajagopalan S, Winter CC, Peruzzi M, Long EO. Killer cell inhibitory receptors specific for HLA-C and HLA-B identified by direct binding and by functional transfer. Immunity. 1995; 3(6):801-809. (Biology). View Reference
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