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      RB744 Mouse Anti-Human CD8
      Product Details
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      BD OptiBuild™
      CD8; CD8A; Leu2; OKT8 T-cell antigen; T8 T-cell antigen
      Human (Tested in Development)
      Mouse BALB/c x A/J, also known as CAF1 IgG2a, κ
      Normal Human Thymocytes
      Flow cytometry (Qualified)
      0.2 mg/ml
      HLDA VI: T 6T-CD8.3; T 6T-R8; BP 495
      925
      Aqueous buffered solution containing ≤0.09% sodium azide.
      RUO


      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.
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      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® CompBeads to ensure that BD® CompBeads are appropriate for your specific cellular application.

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      Product Notices

      1. Please refer to www.bdbiosciences.com/us/s/resources for technical protocols.
      2. Please refer to http://regdocs.bd.com to access safety data sheets (SDS).
      3. For U.S. patents that may apply, see bd.com/patents.
      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. Since applications vary, each investigator should titrate the reagent to obtain optimal results.
      6. 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.
      7. 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.
      8. 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.
      9. For fluorochrome spectra and suitable instrument settings, please refer to our Multicolor Flow Cytometry web page at www.bdbiosciences.com/colors.
      10. An isotype control should be used at the same concentration as the antibody of interest.
      11. 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.
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      758128 Rev. 1
      Antibody Details
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      OKT8

      The OKT8 monoclonal antibody specifically recognizes CD8 alpha (CD8a or CD8α). CD8a is a ~32-34 kDa type I transmembrane glycoprotein that is encoded by CD8A, which belongs to the immunoglobulin superfamily (IgSF), and is commonly referred to as CD8. CD8a is expressed by the majority of thymocytes, subpopulations of  αβ T cells and γδ T cells, and by subsets of NK cells. Cell surface CD8a is expressed either as a disulfide-linked homodimer (CD8αα) or as a heterodimer (CD8αβ) when disulfide-bonded to a CD8 beta chain (CD8b or CD8β). CD8-positive αβ T cells coexpress both CD8αα homodimers and CD8αβ heterodimers whereas some γδ T cells and NK cells express CD8αα homodimers.  CD8 plays important roles in T cell activation and selection. The extracellular IgSF domain of CD8α binds to a non-polymorphic determinant on HLA class I molecules (α3 domain) and enables CD8 to function as a coreceptor with MHC class I-restricted TCR during T cell recognition of antigen. The cytoplasmic domain of CD8α associates with Lck, a Src family protein tyrosine kinase that is involved in intracellular signaling. The OKT8 antibody reportedly crossreacts with CD8a expressed by leucocytes from some non-human primate (NHP) species.

      758128 Rev. 1
      Format Details
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      RB744
      The BD Horizon RealBlue™ 744 (RB744) Dye is part of the BD® family of blue dyes. It is a tandem fluorochrome with an excitation maximum (Ex Max) at 498-nm and an emission maximum (Em Max) at 746-nm as measured using an antibody-dye conjugate. Driven by BD® innovation, RB744 can be used on both spectral and conventional cytometers and is designed to be excited by the Blue laser (488-nm) with minimal excitation by the 561-nm Yellow-Green laser. For conventional instruments equipped with a Blue laser (488-nm), we recommend using an optical filter centered near 750-nm (e.g., a 750/60-nm bandpass filter).
      altImg
      RB744
      Blue 488 nm
      498 nm
      746 nm
      758128 Rev.1
      Citations & References
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      View product citations for antibody "758128" on CiteAb

      Development References (10)

      1. Hoffman RA, Kung PC, Hansen WP, Goldstein G.. Simple and rapid measurement of human T lymphocytes and their subclasses in peripheral blood.. Proc Natl Acad Sci U S A. 1980; 77(8):4914-4917. (Clone-specific: Flow cytometry). View Reference
      2. Kishimoto T. Tadamitsu Kishimoto .. et al., ed. Leucocyte typing VI : white cell differentiation antigens : proceedings of the sixth international workshop and conference held in Kobe, Japan, 10-14 November 1996. New York: Garland Pub.; 1997.
      3. Lai AY, Fatemi M, Dhasarathy A, et al. DNA methylation prevents CTCF-mediated silencing of the oncogene BCL6 in B cell lymphomas.. J Exp Med. 2010; 207(9):1939-50. (Clone-specific: Depletion). View Reference
      4. Mattila JT, Diedrich CR, Lin PL, Phuah J, Flynn JL. Simian immunodeficiency virus-induced changes in T cell cytokine responses in cynomolgus macaques with latent Mycobacterium tuberculosis infection are associated with timing of reactivation.. J Immunol. 2011; 186(6):3527-37. (Clone-specific: Flow cytometry). View Reference
      5. Myburgh JA, Smit JA, Stark JH, Browde S. Total lymphoid irradiation in kidney and liver transplantation in the baboon: prolonged graft survival and alterations in T cell subsets with low cumulative dose regimens.. J Immunol. 1984; 132(2):1019-25. (Clone-specific: Cytotoxicity, Depletion). View Reference
      6. Perussia B, Fanning V, Trinchieri G. A human NK and K cell subset shares with cytotoxic T cells expression of the antigen recognized by antibody OKT8.. J Immunol. 1983; 131(1):223-31. (Clone-specific: Flow cytometry). View Reference
      7. Reimann KA, Waite BC, Lee-Parritz DE, et al. Use of human leukocyte-specific monoclonal antibodies for clinically immunophenotyping lymphocytes of rhesus monkeys. Cytometry. 1994; 17(1):102-108. (Clone-specific: Flow cytometry). View Reference
      8. Reinherz EL. Reinherz EL, Haynes BF, Nadler LM, Bernstein ID, ed. Leukocyte Typing II. New York, NY: Springer-Verlag; 1986:1-549.
      9. Shiue L, Gorman SD, Parnes JR. A second chain of human CD8 is expressed on peripheral blood lymphocytes.. J Exp Med. 1988; 168(6):1993-2005. (Clone-specific: Flow cytometry). View Reference
      10. Teles RM, Krutzik SR, Ochoa MT, Oliveira RB, Sarno EN, Modlin RL. Interleukin-4 regulates the expression of CD209 and subsequent uptake of Mycobacterium leprae by Schwann cells in human leprosy.. Infect Immun. 2010; 78(11):4634-43. (Clone-specific: Immunohistochemistry). View Reference
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      758128 Rev. 1

       

      Please refer to Support Documents for Quality Certificates


      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.