CTLA-4 (Cytotoxic T-Lymphocyte Antigen 4), also known as CD152, is a protein receptor that down regulates the immune system. It is a member of the immunoglobulin superfamily, which is expressed on the surface of Helper T cells and transmits an inhibitory signal to T cells. CTLA4 is similar to the T-cell co-stimulatory protein, CD28, and both molecules bind to CD80 and CD86, also called B7-1 and B7-2 respectively, on antigen-presenting cells. CTLA4 transmits an inhibitory signal to T cells, whereas CD28 transmits a stimulatory signal. Blockade of CTLA4 expression in vitro augmented HIV-specific CD4-positive T-cell function.
Formulation
0.5mg/ml if reconstituted with 0.2ml sterile DI water
Host
Rabbit
Immunogen Region
A recombinant mouse protein corresponding to amino acids E36-D161 was used as the immunogen for the CTLA-4 antibody.
Isotype
IgG
Predicted Reactivity
Mouse, Rat
Reactivity
Mouse, Rat
Recombinant
No
Subcellular Location
Cell surface, cytoplasmic
Uniprot
P09793
Buffer
Lyophilized from 1X PBS with 2.5% BSA, 0.025% sodium azide
Format
Antigen affinity purified
Purification
Antigen affinity
Storage
After reconstitution, the CTLA-4 antibody can be stored for up to one month at 4°C. For long-term, aliquot and store at -20°C. Avoid repeated freezing and thawing.