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R718 Mouse Anti-Human TCR Vβ5.2/5.3
Product Details
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BD OptiBuild™
TCR Vβ5.2, TRBV5-6, TCRBV5S2; TCR Vβ5.3, TRBV5-5, TCRBV5S3
Human (Tested in Development)
Mouse IgG2a, κ
Flow cytometry (Qualified)
0.2 mg/ml
Aqueous buffered solution containing ≤0.09% sodium azide.

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.

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

Product Notices

  1. Researchers should determine the optimal concentration of this reagent for their individual applications.
  2. 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.
  3. An isotype control should be used at the same concentration as the antibody of interest.
  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. Alexa Fluor™ is a trademark of Life Technologies Corporation.
  6. Please refer to to access safety data sheets (SDS).
  7. Please refer to for technical protocols.
  8. This product is provided under an Agreement between BIOTIUM and BD Biosciences. This product, and only in the amount purchased by buyer, may be used solely for buyer’s own internal research, in a manner consistent with the accompanying product literature. No other right to use, sell or otherwise transfer (a) this product, or (b) its components is hereby granted expressly, by implication or by estoppel. This product is for research use only. Diagnostic uses require a separate license from Biotium, Inc. For information on purchasing a license to this product including for purposes other than research, contact Biotium, Inc., 3159 Corporate Place, Hayward, CA 94545, Tel: (510) 265-1027. Fax: (510) 265-1352. Email:
752695 Rev. 1
Antibody Details
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The MH3-2 monoclonal antibody specifically recognizes the human variable beta 5.2 (TCR Vβ5.2) and variable beta 5.3 (TCR Vβ5.3) domains of the beta subunit for the αβ T cell receptor (TCR Vβ5.2/5.3). The TCR Vβ5.2 and TCR Vβ5.3 domains are encoded by the TRBV5-6 (T cell receptor beta variable 5-6; also known as TCRBV5S2) and TRBV5-5 (T cell receptor beta variable 5-5; TCRBV5S3) gene segments of the multimembered Vβ5 subfamily within the TRB (T cell receptor beta locus), respectively. Functional T-cell receptor beta chains (TCR-β) are generated by genomic rearrangement of TCR variable (Vβ), diversity (Dβ), joining (Jβ) and constant (Cβ) region gene segments by precursor T cells. Distinct αβ TCR containing either TCR Vβ5.2 or TCR Vβ5.3 are clonally expressed on subsets of thymocytes or peripheral CD4+ or CD8+ T cells. These TCR β beta chains can heterodimerize with TCR α chains to form αβ TCR that function as signaling T cell receptors for antigen. Human αβ TCR recognize peptides presented by HLA (MHC) molecules and in conjunction with the associated CD3 complex, can transduce intracellular signals that initiate precursor or mature T cell responses. The MH3-2 antibody may be useful for analyzing the frequencies or numbers of TCR Vβ5.2/5.3-positive thymocytes or mature T cells as well as the levels of TCR Vβ5.2/5.3 expressed by these cells. The MH3-2 antibody can be used in research applications such as flow cytometry to help characterize the TCR Vβ repertoires of precursor or mature T cell populations.

The antibody was conjugated to BD Horizon Red 718, which has been developed exclusively for BD Biosciences as a better alternative to Alexa Fluor™ 700. BD Horizon Red 718 can be excited by the red laser (628 – 640 nm) and, with an Em Max around 718 nm, it can be detected using a 730/45 nm filter. Due to similar excitation and emission properties, we do not recommend using R718 in combination with APC-R700 or Alexa Fluor™ 700.

752695 Rev. 1
Format Details
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The BD Horizon™ Red 718 (R718) Dye is part of the BD red family of dyes. It is a small organic fluorochrome with an excitation maximum (Ex Max) at 695-nm and an emission maximum (Em Max) at 718-nm. Driven by BD innovation, R718 is designed to be excited by the red laser (627–640-nm) and detected using an optical filter centered near 720-nm (e.g., a 720/40-nm bandpass filter). R718 is a brighter alternative to Alexa Fluor™ 700. R718 is also a bright small molecule alternative to APC-R700 with lower spread into the APC detector. Please ensure that your instrument’s configurations (lasers and optical filters) are appropriate for this dye.
Red 627-640 nm
695 nm
718 nm
752695 Rev.1
Citations & References
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Development References (7)

  1. Folch G, Jabado-Michaloud J, Lefranc M-P. Reagents monoclonal antibodies: anti-human TRBV, IMGT repertoire, IMGT Web resources. IMGT®. 2020; 4. (Clone-specific: Flow cytometry).
  2. Kabelitz D, Wesch, D. T-Cell Receptor Analysis by Flow Cytometry. In: Sack U, Tarnok A, Rothe G. Sack U, Tarnok A, Rothe G, ed. Basic Principles, Methods and Clinical Applications of Flow Cytometry. New York: Karger, Basel; 2009:200-210. View Reference
  3. Labrecque N, McGrath H, Subramanyam M, Huber BT, Sékaly RP. Human T cells respond to mouse mammary tumor virus-encoded superantigen: V beta restriction and conserved evolutionary features.. J Exp Med. 1993; 177(6):1735-43. (Clone-specific: Flow cytometry). View Reference
  4. Oh S, Terabe M, Pendleton CD, et al. Human CTLs to wild-type and enhanced epitopes of a novel prostate and breast tumor-associated protein, TARP, lyse human breast cancer cells.. Cancer Res. 2004; 64(7):2610-8. (Clone-specific: Flow cytometry). View Reference
  5. Posnett DN, Romagne F, Necker A, Kotzin BL, Sékaly R-P. First human TCR monoclonal antibody workshop. The Immunologist. 1996; 4(1):5-8. (Clone-specific).
  6. Soudeyns H, Champagne P, Holloway CL, et al. Transient T cell receptor beta-chain variable region-specific expansions of CD4+ and CD8+ T cells during the early phase of pediatric human immunodeficiency virus infection: characterization of expanded cell populations by T cell receptor phenotyping.. J Infect Dis. 2000; 181(1):107-20. (Clone-specific: Flow cytometry). View Reference
  7. Vonderheid EC, Boselli CM, Conroy M, et al. Evidence for restricted Vbeta usage in the leukemic phase of cutaneous T cell lymphoma.. J Invest Dermatol. 2005; 124(3):651-61. (Clone-specific: Flow cytometry). View Reference
View All (7) View Less
752695 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.