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Purified Mouse Anti-Human CD152
Product Details
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BD Pharmingen™
CTLA-4; AILIM; Cytotoxic T-lymphocyte protein 4
Human (QC Testing), Rhesus, Cynomolgus, Baboon (Tested in Development)
Mouse BALB/c IgG2a, κ
Human CTLA4 Recombinant Protein
Flow cytometry (Routinely Tested), Immunohistochemistry-frozen, Intracellular staining (flow cytometry) (Tested During Development)
0.5 mg/ml
Aqueous buffered solution containing ≤0.09% sodium azide.

Preparation And Storage

Store undiluted at 4°C. The monoclonal antibody was purified from tissue culture supernatant or ascites by affinity chromatography.

Recommended Assay Procedures

For flow cytometric applications, a three step labeling procedure is recommended for amplifying signal. Suggested protocol for 3-step staining using concanavalin-A-stimulated peripheral blood mononuclear cells method:

1. Incubate 100 µl concanavalin-A-stimulated 3-day peripheral blood mononuclear cells (1 x 10^6) with primary (unconjugated) antibody for 20-30 minutes at room temperature.

2. Add 2 mls of 1X PharM Lyse (10X PharM Lyse, Cat. No. 555899) and incubate for 10-15 minutes. Centrifuge and aspirate.

3. Wash once with PBS/0.1% sodium azide/1% heat-inactivated  fetal bovine serum (PBS-FBS). Centrifuge and aspirate.

4. Add biotinylated goat anti-mouse Ig's  (Cat. No. 553999) and incubate for 20-30 minutes at room temperature.

5. Wash once with PBS-FBS. Centrifuge and aspirate.

6. Add SAV-PE (Cat. No. 554061) and incubate for 20-30 minutes in the dark at room temperature.

7. Wash once with PBS-FBS. Centrifuge and aspirate. Resuspend in 0.5 ml of PBS-FBS and analyze by flow cytometry.

Product Notices

  1. Since applications vary, each investigator should titrate the reagent to obtain optimal results.
  2. An isotype control should be used at the same concentration as the antibody of interest.
  3. 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.
  4. Sodium azide is a reversible inhibitor of oxidative metabolism; therefore, antibody preparations containing this preservative agent must not be used in cell cultures nor injected into animals. Sodium azide may be removed by washing stained cells or plate-bound antibody or dialyzing soluble antibody in sodium azide-free buffer. Since endotoxin may also affect the results of functional studies, we recommend the NA/LE (No Azide/Low Endotoxin) antibody format, if available, for in vitro and in vivo use.
  5. Species cross-reactivity detected in product development may not have been confirmed on every format and/or application.
  6. Please refer to for technical protocols.
555851 Rev. 7
Antibody Details
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The BNI3 monoclonal antibody specifically binds to the human cytolytic T lymphocyte-associated antigen (CTLA-4), also known as CD152. CTLA-4 is transiently expressed on activated CD28+ T cells and binds to CD80 and CD86 present on antigen presenting cells (APC) with high avidity. This interaction appears to deliver a negative regulatory signal to the T cell. Recent reports indicate that CTLA-4 is also expressed on B cells when cultured with activated T cells, suggesting a role for CTLA-4 in the regulation of B-cell response. Immobilized BNI3 antibody enhances T-cell proliferation induced by antibody-mediated crosslinking of CD3 and CD28. Recent studies have shown that CD152 can be expressed by regulatory T (Treg) cells. After cellular fixation and permeabilization, the BNI3 antibody can stain intracellular CD152 expressed in T cells including Treg cells. Clone BNI3 was studied in the VI Leukocyte Typing Workshop.

Clone BNI3 also cross-reacts with a subset of peripheral blood lymphocytes of baboon, and both rhesus and cynomolgus macaque monkeys, following Concanavalin A (Con A) treatment. The distribution of BNI3+ cells following activation is similar to that observed with peripheral blood lymphocytes from normal human donors.

555851 Rev. 7
Format Details
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Tissue culture supernatant is purified by either protein A/G or affinity purification methods. Both methods yield antibody in solution that is free of most other soluble proteins, lipids, etc. This format provides pure antibody that is suitable for a number of downstream applications including: secondary labeling for flow cytometry or microscopy, ELISA, Western blot, etc.
555851 Rev.7
Citations & References
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Development References (4)

  1. Barclay NA, Brown MH, Birkeland ML, et al, ed. The Leukocyte Antigen FactsBook. San Diego, CA: Academic Press; 1997.
  2. Kuiper HM, Brouwer M, Linsley PS, van Lier RA. Activated T cells can induce high levels of CTLA-4 expression on B cells. J Immunol. 1995; 155(4):1776-1783. (Biology). View Reference
  3. Lindsten T, Lee KP, Harris ES, et al. Characterization of CTLA-4 structure and expression on human T cells. J Immunol. 1993; 151(7):3489-3499. (Biology). View Reference
  4. Morton PA, Fu XT, Stewart JA, et al. Differential effects of CTLA-4 substitutions on the binding of human CD80 (B7-1) and CD86 (B7-2). J Immunol. 1996; 156(3):1047-1054. (Biology). View Reference
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555851 Rev. 7

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.