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BV421 Rat Anti-Mouse CD71

BV421 Rat Anti-Mouse CD71

Clone RI7217 (also known as RI7 217.1.3; R17 217.1.4; R17 217; R17217)

Product Details
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BD OptiBuild™
Tfrc; TFR; TFR1; TR; Trfr; Mtvr1
Mouse (Tested in Development)
Rat BDIX IgG2a, κ
Mouse erythroleukemia
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 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 CompBead to ensure that BD Comp beads are appropriate for your specific cellular application.

For optimal and reproducible results, BD Horizon Brilliant Stain Buffer should be used anytime two or more BD Horizon Brilliant dyes are used in the same experiment.  Fluorescent dye interactions may cause staining artifacts which may affect data interpretation.  The BD Horizon Brilliant Stain Buffer was designed to minimize these interactions.  More information can be found in the Technical Data Sheet of the BD Horizon Brilliant Stain Buffer (Cat. No. 563794/566349) or the BD Horizon Brilliant Stain Buffer Plus (Cat. No. 566385).

Product Notices

  1. 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.
  2. Researchers should determine the optimal concentration of this reagent for their individual applications.
  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. For fluorochrome spectra and suitable instrument settings, please refer to our Multicolor Flow Cytometry web page at
  6. Please refer to for technical protocols.
  7. BD Horizon Brilliant Stain Buffer is covered by one or more of the following US patents: 8,110,673; 8,158,444; 8,575,303; 8,354,239.
  8. Please refer to to access safety data sheets (SDS).
  9. Pacific Blue™ is a trademark of Molecular Probes, Inc., Eugene, OR.
  10. BD Horizon Brilliant Violet 421 is covered by one or more of the following US patents: 8,158,444; 8,362,193; 8,575,303; 8,354,239.
752398 Rev. 1
Antibody Details
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The RI7217 monoclonal antibody specifically recognizes the mouse Transferrin Receptor (TfR, Trfr, or TR), which is also known as Transferrin Receptor protein 1 (TfR1), CD71, and Mammary tumor virus receptor 1 (Mtvr-1 or Mtvr1). CD71 is a ~95-kDa single-pass type II transmembrane glycoprotein that is encoded by Tfrc and expressed on the cell surface as a disulfide-linked homodimer. The CD71 monomer is comprised of an extracellular C-terminal domain with a transferrin binding site followed by a transmembrane region and an N-terminal cytoplasmic tail that is involved in mediating the endocytosis and recycling of the receptor. This receptor mediates cellular iron uptake via endocytosis of an iron-transferrin complex followed by the recycling of transferrin and the receptor to the cell surface. CD71 is lowly expressed on most nonactivated cells including resting B and T lymphocytes. CD71 expression is upregulated on activated and proliferating cells such as mitogen- or antigen-stimulated B cells and T cells as well as some tumor cells. CD71 is variably expressed on erythroid precursors from pronormoblasts (proerythroblasts) to reticulocytes and is absent on mature red blood cells. CD71 is expressed on erythroid precursors that utilize iron for heme synthesis. CD71 can also serve as an entry receptor for several viral infections including those caused by Mouse mammary tumor virus (MMTV). The RI7217 antibody can reportedly be used to inhibit cellular proliferation.

The antibody was conjugated to BD Horizon BV421 which is part of the BD Horizon Brilliant™ Violet family of dyes. With an Ex Max near 407 nm and Em Max near 421 nm, BD Horizon BV421 can be excited by the violet laser (405 nm) and detected with a 450/50 nm filter. BD Horizon BV421 conjugates are very bright, often exhibiting a 10 fold improvement in brightness compared to Pacific Blue™ conjugates. Due to nearly identical excitation and emission properties but different spillover characteristics, BD Horizon BV421, Pacific Blue™, and BD Horizon V450 cannot be used simultaneously.

752398 Rev. 1
Format Details
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The BD Horizon Brilliant Violet™ 421 (BV421) Dye is part of the BD Horizon Brilliant Violet™ family of dyes. This polymer-technology based dye has an excitation maximum (Ex Max) of 407-nm and an emission maximum (Em Max) at 423-nm. Driven by BD innovation, BV421 is designed to be excited by the violet laser (405-nm) and detected using an optical filter centered near 420-nm (e.g., a 431/28-nm or 450/50-nm bandpass filter). BV421 is an ideal alternative for V450 as it is approximately ten times brighter with less spillover into the BV510/V500 detector. Please ensure that your instrument’s configurations (lasers and optical filters) are appropriate for this dye.
Violet 405 nm
407 nm
423 nm
752398 Rev.1
Citations & References
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Development References (6)

  1. Ernst DN, McQuitty DN, Weigle WO, Hobbs MV. Expression of membrane activation antigens on murine B lymphocytes stimulated with lipopolysaccharide. Cell Immunol. 1988; 114(1):161-173. (Clone-specific: Flow cytometry). View Reference
  2. Ernst DN, Weigle WO, McQuitty DN, Rothermel AL, Hobbs MV. Stimulation of murine T cell subsets with anti-CD3 antibody. Age-related defects in the expression of early activation molecules. J Immunol. 1989; 142(5):1413-1421. (Clone-specific: Flow cytometry). View Reference
  3. Kemp JD, Thorson JA, Gomez F, Smith KM, Cowdery JS, Ballas ZK. Inhibition of lymphocyte activation with anti-transferrin receptor Mabs: a comparison of three reagents and further studies of their range of effects and mechanism of action. Cell Immunol. 1989; 122(1):218-230. (Clone-specific: Functional assay, Inhibition). View Reference
  4. Lesley J, Hyman R, Schulte R, Trotter J. Expression of transferrin receptor on murine hematopoietic progenitors.. Cell Immunol. 1984; 83(1):14-25. (Immunogen: Flow cytometry). View Reference
  5. Lesley JF, Schulte RJ. Inhibition of cell growth by monoclonal anti-transferrin receptor antibodies.. Mol Cell Biol. 1985; 5(8):1814-21. (Clone-specific: Blocking, Flow cytometry, Functional assay, Inhibition). View Reference
  6. Motamedi M, Xu L, Elahi S. Correlation of transferrin receptor (CD71) with Ki67 expression on stimulated human and mouse T cells: The kinetics of expression of T cell activation markers.. J Immunol Methods. 2016; 437:43-52. (Biology: Flow cytometry). View Reference
View All (6) View Less
752398 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.