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Multiparameter flow cytometric analysis of CD11b (Integrin αM) expression on Human peripheral blood leukocytes. Human whole blood was stained with either BD Horizon™ RY703 Rat IgG2b, κ Isotype Control (Cat. No. 571455; Left Plot) or BD Horizon™ RY703 Rat Anti-CD11b (Integrin αM) antibody (Cat. No. 571473/571474; Right Plot) at 1 µg/test. Erythrocytes were lysed with BD Pharm Lyse™ Lysing Buffer (Cat. No. 555899). The bivariate pseudocolor density plot showing the correlated expression of CD11b (Integrin αM) [or Ig Isotype control staining] versus side light-scatter (SSC-A) signals was derived from gated events with the forward and side light-scatter characteristics of viable leukocyte populations. Samples were acquired on the BD FACSymphony™ A5 SE Cell Analyzer and analyzed using FlowJo™ v10.8 Software. Data shown on this Technical Data Sheet are not lot specific.
Multiparameter flow cytometric analysis of CD11b (Integrin αM) expression on Mouse bone marrow cells. Mouse bone marrow cells were preincubated with Purified Rat Anti-Mouse CD16/CD32 antibody (Mouse BD Fc Block™) [Cat. No. 553142]. The cells were then stained with either BD Horizon™ RY703 Rat IgG2b, κ Isotype Control (Cat. No. 571455; Left Plot) or BD Horizon™ RY703 Rat Anti-CD11b (Integrin αM) antibody (Cat. No. 571473/571474; Right Plot) at 0.25 µg/test. BD Pharmingen™ DAPI Solution (Cat. No. 564907) was added to cells right before analysis. The bivariate pseudocolor density plot showing the correlated expression of CD11b (Integrin αM) [or Ig Isotype control staining] versus side light-scatter (SSC-A) signals was derived from gated events with the forward and side light-scatter characteristics of viable (DAPI-negative) bone marrow cell populations. Samples were acquired on the BD FACSymphony™ A5 SE Cell Analyzer and analyzed using FlowJo™ v10.8 Software. Data shown on this Technical Data Sheet are not lot specific.
BD Horizon™ RY703 Rat Anti-CD11b (Integrin αM)
BD Horizon™ RY703 Rat Anti-CD11b (Integrin αM)
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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® CompBeads to ensure that BD® CompBeads are appropriate for your specific cellular application.
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- Please refer to www.bdbiosciences.com/us/s/resources for technical protocols.
- 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.
- Since applications vary, each investigator should titrate the reagent to obtain optimal results.
- For fluorochrome spectra and suitable instrument settings, please refer to our Multicolor Flow Cytometry web page at www.bdbiosciences.com/colors.
- An isotype control should be used at the same concentration as the antibody of interest.
- Please refer to http://regdocs.bd.com to access safety data sheets (SDS).
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- Human donor specific background has been observed in relation to the presence of anti-polyethylene glycol (PEG) antibodies, developed as a result of certain vaccines containing PEG, including some COVID-19 vaccines. We recommend use of BD Horizon Brilliant™ Stain Buffer in your experiments to help mitigate potential background. For more information visit https://www.bdbiosciences.com/en-us/support/product-notices.
- For U.S. patents that may apply, see bd.com/patents.
- When using high concentrations of antibody, background binding of this dye to erythroid fragments produced by ammonium chloride-based lysis, such as with BD Pharm Lyse™ Lysing Buffer (Cat. No. 555899), has been observed when the antibody conjugate was present during the lysis procedure. This may cause nonspecific staining of target cells, such as leukocytes, which have bound the resulting erythroid fragments. This background can be mitigated by any of the following: titrating the antibody conjugate to a lower concentration, fixing samples with formaldehyde, or removing erythrocytes before staining (eg, gradient centrifugation or pre-lysis with wash). This background has not been observed when cells were lysed with BD FACS™ Lysing Solution (Cat. No. 349202) after staining.
- Please observe the following precautions: We recommend that special precautions be taken (such as wrapping vials, tubes, or racks in aluminum foil) to protect exposure of conjugated reagents, including cells stained with those reagents, to any room illumination. Absorption of visible light can significantly affect the emission spectra and quantum yield of tandem fluorochrome conjugates.
- Tandem fluorochromes contain both an energy donor and an energy acceptor. Although every effort is made to minimize the lot-to-lot variation in the efficiency of the fluorochrome energy transfer, differences in the residual emission from the donor may be observed. Additionally, multi-laser cytometers may directly excite both the donor and acceptor fluorochromes. Therefore, we recommend for every tandem conjugate, a matched individual single-stain control be acquired for generating a compensation or spectral unmixing matrix.
The M1/70 monoclonal antibody specifically binds to CD11b, also known as Integrin alpha M (Itgam or αM). CD11b is a 170-kDa type 1 transmembrane glycoprotein and belongs to the Integrin alpha chain family. CD11b serves as the alpha chain of the heterodimeric Mac-1 integrin (CD11b/CD18, αMβ2), also known as complement receptor 3 (CR3). Mac-1 mediates adhesion to ICAM-1 (CD54), ICAM-2 (CD102), fibrinogen and binding to C3bi. Mac-1 is expressed at varying levels on granulocytes, macrophages, myeloid-derived dendritic cells, natural killer cells, microglia, and B-1 B lymphocytes. Mac-1 expression is rapidly upregulated on neutrophils after activation, in the same time period that CD62L (L-selectin) is shed from the cell surface. The M1/70 antibody reportedly blocks cell adherence and C3bi binding but does not block cell-mediated lysis. Cross-reaction of the M1/70 antibody with CD11b expressed on human monocytes, polymorphonuclear leukocytes, and NK cells has been reported.
研发参考 (12)
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Beller DI, Springer TA, Schreiber RD. Anti-Mac-1 selectively inhibits the mouse and human type three complement receptor. J Exp Med. 1982; 156(4):1000-1009. (Clone-specific: Blocking, Inhibition). 查看参考
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Lub M, van Kooyk Y, Figdor CG. Competition between lymphocyte function-associated antigen 1 (CD11a/CD18) and Mac-1 (CD11b/CD18) for binding to intercellular adhesion molecule-1 (CD54). J Leukoc Biol. 1996; 59(5):648-655. (Clone-specific: Immunoprecipitation). 查看参考
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Sanchez-Madrid F, Simon P, Thompson S, Springer TA. Mapping of antigenic and functional epitopes on the alpha- and beta-subunits of two related mouse glycoproteins involved in cell interactions, LFA-1 and Mac-1. J Exp Med. 1983; 158(2):586-602. (Clone-specific: Immunoaffinity chromatography, Immunoprecipitation, Inhibition). 查看参考
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Springer T, Galfre G, Secher D, Milstein C. Monoclonal xenogeneic antibodies to mouse leukocyte antigens: identification of macrophage-specific and other differentiation antigens. Curr Top Microbiol Immunol. 1978; 81:45-50. (Immunogen: Immunoprecipitation, Radioimmunoassay). 查看参考
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Springer T, Galfre G, Secher DS, Milstein C. Mac-1: a macrophage differentiation antigen identified by monoclonal antibody. Eur J Immunol. 1979; 9(4):301-306. (Clone-specific: Flow cytometry, Immunoprecipitation). 查看参考
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Springer T, Galfre G, Secher DS, Milstein C. Monoclonal xenogeneic antibodies to murine cell surface antigens: identification of novel leukocyte differentiation antigens. Eur J Immunol. 1978; 8(8):539-551. (Immunogen: Immunoprecipitation). 查看参考
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Springer TA, Davignon D, Ho MK, Kurzinger K, Martz E, Sanchez-Madrid F. LFA-1 and Lyt-2,3, molecules associated with T lymphocyte-mediated killing; and Mac-1, an LFA-1 homologue associated with complement receptor function. Immunol Rev. 1982; 68:171-195. (Immunogen: Immunoprecipitation, Radioimmunoassay). 查看参考
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