CD28 Antibody - BSA Free


Western Blot: CD28 Antibody [NB100-93558] - WB detection of human CD28 in CD4+ cells with NB100-93558 antibody at a dilution of 1:500

Product Details

Reactivity HuSpecies Glossary
Applications WB
BSA Free
1 mg/ml

Order Details

CD28 Antibody - BSA Free Summary

Synthetic peptide corresponding to residues 72-85 [SQQLQVYSKTGFN], which is the Ig-V-like region of human CD28.
Immunogen affinity purified
Innovator's Reward
Test in a species/application not listed above to receive a full credit towards a future purchase.


  • Western Blot 1:100-1:2000
Application Notes
This antibody is useful for Western Blot. The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
Theoretical MW
95 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.

Packaging, Storage & Formulations

Store at 4C short term. Aliquot and store at -20C long term. Avoid freeze-thaw cycles.
0.02% Sodium Azide
1 mg/ml
Immunogen affinity purified

Alternate Names for CD28 Antibody - BSA Free

  • CD28 antigen (Tp44)
  • CD28 antigen
  • CD28 molecule
  • CD28
  • MGC138290
  • T-cell-specific surface glycoprotein CD28
  • Tp44


CD28 (cluster differentiation 28) is a 44 kDa disulfide linked homodimeric T cell specific surface glycoprotein with a role in providing co-stimulatory signals required for T cell activation and survival (1). The CD28 family of receptors, including PD-1, CTLA-4, and ICOS, share several common features including paired V-set immunoglobulin superfamily (IgSF) domains attached to a single transmembrane domain and cytoplasmic domains containing critical signaling motifs (2). Additionally, CD28 and CTLA-4 are very similar in genomic organization. The corresponding genes co-map on human chromosome 2q33 and mouse chromosome 1 (3). Human CD28 isoform 1 is synthesized as a protein of 220 amino acids (aa) in length with a calculated molecular weight of 25 kDa (3).

CD28 is the prototypical and best-characterized costimulatory molecule on T cells (4). Its signals are critical for optimal naive T cell activation, cytokine production, proliferation, and survival (4). In order to sustain T cell activation, CD28 will consolidate immunological synapse formation, increase cell cycle progression through upregulated D-cyclin expression, and aid in T cell survival by in inducing the expression of the anti-apoptotic protein Bcl-XL (5). CD28 is constitutively expressed on naive and central memory CD4+ and CD8+ cells (5). CD28 deficiency has a large impact on T cell responses including activation, proliferation, immunoglobulin (Ig) class-switching, and germinal center (GC) formation (6). CD28 is a critical regulator of autoimmune diseases and tolerance to solid organ transplants in human patients (6). The CD28 pathway plays a central role in immune responses against pathogens, autoimmune diseases, and graft rejection (7). CD28 engagement via antibodies augments the proliferation of T cells in response to immobilized anti-CD3 antibodies (8). Additionally, antibody engagement of CD28 can supply costimulation to T cells encountering APCs deficient in costimulatory ligands, such as CD80 and CD86, and prevents the resultant anergic state that otherwise occurs in the absence of costimulatory signaling (8).


1. Esensten, J. H., Helou, Y. A., Chopra, G., Weiss, A., & Bluestone, J. A. (2016). CD28 Costimulation: From Mechanism to Therapy. Immunity, 44(5), 973-988.

2. Carreno, B. M., & Collins, M. (2002). The B7 family of ligands and its receptors: new pathways for costimulation and inhibition of immune responses. Annual review of immunology, 20, 29-53.

3. Ward S. G. (1996). CD28: a signaling perspective. The Biochemical journal, 318 (Pt 2), 361-377.

4. Zhang, R., Huynh, A., Whitcher, G., Chang, J., Maltzman, J. S., & Turka, L. A. (2013). An obligate cell-intrinsic function for CD28 in Tregs. The Journal of clinical investigation, 123(2), 580-593.

5. Evans, E. J., Esnouf, R. M., Manso-Sancho, R., Gilbert, R. J., James, J. R., Yu, C., Fennelly, J. A., Vowles, C., Hanke, T., Walse, B., Hunig, T., Sorensen, P., Stuart, D. I., & Davis, S. J. (2005). Crystal structure of a soluble CD28-Fab complex. Nature immunology, 6(3), 271-279.

6. Bour-Jordan, H., & Blueston, J. A. (2002). CD28 function: a balance of costimulatory and regulatory signals. Journal of clinical immunology, 22(1), 1-7.

7. Krummel, M. F., & Allison, J. P. (1995). CD28 and CTLA-4 have opposing effects on the response of T cells to stimulation. The Journal of experimental medicine, 182(2), 459-465.

8. Luhder, F., Huang, Y., Dennehy, K. M., Guntermann, C., Muller, I., Winkler, E., Kerkau, T., Ikemizu, S., Davis, S. J., Hanke, T., & Hunig, T. (2003). Topological requirements and signaling properties of T cell-activating, anti-CD28 antibody superagonists. The Journal of experimental medicine, 197(8), 955-966.


This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

Customers Who Viewed This Item Also Viewed...

Species: Hu
Applications: BA
Species: Hu
Applications: BA
Species: Hu
Applications: CyTOF-ready, Dual ISH-IHC, ELISA(Cap), ELISA(Det), ELISA(Sta), Flow, IHC, Neut
Species: Hu
Applications: CyTOF-ready, ELISA, Flow, ICC/IF, IHC, IHC-P, PA, WB
Species: Hu, Mu
Applications: Flow-IC, Flow, ICC/IF, IHC, IHC-Fr, IHC-P, IP, WB
Species: Ca, Hu, Mu, Po, Rb, Rt
Applications: Dual ISH-IHC, Flow, ICC/IF, IHC, IHC-Fr, IHC-P, Simple Western, WB
Species: Hu, Mu, Rt
Applications: Flow, ICC/IF, IHC, IHC-Fr, IHC-P, KO, WB
Species: Mu, Rt
Applications: Cell Depl, CyTOF-ready, Flow, ICC/IF, IHC, IHC-Fr, IHC-P, IP, InhibTFunc
Species: Hu
Applications: BA
Species: Mu
Applications: ELISA
Species: Hu
Applications: ELISA
Species: Hu
Applications: ELISA
Species: Hu
Applications: ELISA, ICC/IF, S-ELISA, WB
Species: Hu
Applications: Flow, Func, ICC/IF, IHC, IHC-Fr, IHC-P
Species: Hu
Applications: B/N, Flow, IHC, IHC-Fr, WB
Species: Hu
Applications: BA
Species: Hu, Mu, Rt
Applications: Flow, ICC/IF, IHC, IHC-P, WB

Publications for CD28 Antibody (NB100-93558) (0)

There are no publications for CD28 Antibody (NB100-93558).
By submitting your publication information earn gift cards and discounts for future purchases.

Reviews for CD28 Antibody (NB100-93558) (0)

There are no reviews for CD28 Antibody (NB100-93558). By submitting a review you will receive an Amazon e-Gift Card or Novus Product Discount.
  • Review with no image -- $10/€7/£6/$10 CAD/¥70 Yuan/¥1110 Yen
  • Review with an image -- $25/€18/£15/$25 CAD/¥150 Yuan/¥2500 Yen

Product General Protocols

Find general support by application which include: protocols, troubleshooting, illustrated assays, videos and webinars.

Video Protocols

WB Video Protocol

FAQs for CD28 Antibody (NB100-93558) (0)

There are no specific FAQs related to this product. Read our general customer & technical service FAQs.

Secondary Antibodies


Isotype Controls

Additional CD28 Products

Bioinformatics Tool for CD28 Antibody (NB100-93558)

Discover related pathways, diseases and genes to CD28 Antibody (NB100-93558). Need help? Read the Bioinformatics Tool Guide for instructions on using this tool.
Visit Tool

Diseases for CD28 Antibody (NB100-93558)

Discover more about diseases related to CD28 Antibody (NB100-93558).

Pathways for CD28 Antibody (NB100-93558)

View related products by pathway.

PTMs for CD28 Antibody (NB100-93558)

Learn more about PTMs related to CD28 Antibody (NB100-93558).

Research Areas for CD28 Antibody (NB100-93558)

Find related products by research area.

Blogs on CD28.

Thomson Reuters Predicts 2016 Nobel Prize Winners
Here at Bio-Techne we always look forward to the annual announcements of winners of the highly coveted Nobel Prize – the greatest award in science. How can you go about predicting which scientists might be in line for a life-changing phone-call fro...  Read full blog post.

CD80: A co-stimulator of T cell activation
CD80 is a 60kD single chain type I transmembrane glycoprotein that is a member of the immunoglobulin family. CD80 is expressed on activated B- and T-lymphocytes, as well as a subpopulation of previously activated B-cells, but not on the majority of re...  Read full blog post.

Omicron Variant Antibodies

Customers Who Bought This Also Bought

Contact Information

Download our Western Blot eHandbook

Product PDFs


Concentration Calculator

The concentration calculator allows you to quickly calculate the volume, mass or concentration of your vial. Simply enter your mass, volume, or concentration values for your reagent and the calculator will determine the rest.


Review this Product

Be the first to review our CD28 Antibody - BSA Free and receive a gift card or discount.


Gene Symbol CD28