Recognizes a glycoprotein of 44-88kDa, which is identified as CD28. It is the critical T-cell co-stimulatory receptor which provides to the cell the important second activation signal by binding CD80 and CD86 that are expressed by antigen presenting cells. Besides its co-stimulation role, CD28 functions in preventing T-cells from anergic hyporesponsive state or from undergoing premature apoptotic cell death. CD28 is also expressed on human fetal NK cells and some NK cell lines, whereas on murine NK cells the CD28 expression is much broader.

Applications:  Suitable for use in Immunofluorescence, FLISA, Flow Cytometry and Immunohistochemistry. Other applications not tested.

Immunohistochemistry (FFPE): Staining of formalin-fixed tissues is enhanced by boiling tissue sections in 1mM EDTA Buffer, pH 8.5-9.5, for 10-20 min followed by cooling at RT for 20 minutes Optimal dilutions to be determined by the researcher.

Jurkat cells or human lymph nodes and tonsils.

Store product at 4°C in the dark. DO NOT FREEZE! Stable at 4°C for 12 months after receipt as an undiluted liquid. Dilute required amount only prior to immediate use. Further dilutions can be made in assay buffer. Caution: MaxLight™650 conjugates are sensitive to light. For maximum recovery of product, centrifuge the original vial prior to removing the cap. 

Note: Applications are based on unconjugated antibody.

Recombinant human CD28 protein. Cellular Localization: Cell surface

Supplied as a liquid in PBS, pH 7.2. No preservative added. Labeled with MaxLight™650.

Purified by Protein A/G affinity chromatography.

Recognizes human CD28.