Select country set
Menu Shopping cart 0,00 Search
Manufactured by BioVendor

sCD28 Human ELISA

  • Regulatory status:RUO
  • Type:Sandwich ELISA, Biotin-labelled antibody
  • Other names:T-cell-specific surface glycoprotein CD28, TP 44
  • Species:Human
Please select your region to see available products and prices.
Cat. No. Size Price

RAF090R 96 wells (1 kit)
PubMed Product Details
Technical Data


Sandwich ELISA, Biotin-labelled antibody


Serum, Cell culture supernatant

Sample Requirements

50 µl/well


At ambient temperature. Upon receipt, store the product at the temperature recommended below.


Store the complete kit at 2–8°C. Under these conditions, the kit is stable until the expiration date (see label on the box).

Calibration Curve

Calibration Range

0.8–50 ng/ml

Limit of Detection

0.18 ng/ml

Intra-assay (Within-Run)

CV = 5.9%

Inter-assay (Run-to-Run)

CV = 7.2%

Spiking Recovery


Dilution Linearity



Research topic

Cell surface proteins (sCD)


The cluster of differentiation (CD) antigen CD28 is a 44 kDa, disulphide-bonded, homodimeric glycoprotein, which is constitutively expressed on the surface of the majority of T-cells.
CD28 is structurally very closely related to another molecule expressed in activated T-cells, CTLA-4. In particular, the hinge region is completely conserved for both molecules. Also CTLA-4 and CD28 were shown to be very similar at the message and at the gene structure level. The corresponding genes co-map on Human chromosome 2q33.
Ligation of CD28 by its counter receptor, B7, expressed on the surface of antigen presenting cells, has been shown to induce signals that, in synergy with those derived from engagement of the T-cell receptor by an antigen bound to a major histocompatibilty complex, enhance proliferation and cytokine production. Manipulation of this interaction can have dramatic effects on the outcome of T-cell activation. Considerable research has been done on the CD28/B7 costimulatory pathway. Blocking thereof results in immunosuppression with implications for the treatment of autoimmune diseases, allergy, organ transplantation and graft versus host disease.
Activating the CD28/B7 pathway could be useful for including the immune system to recognize and eliminate tumors that evade the immune system.

Related Products Docs