Promotional price valid on web orders only. Your contract pricing may differ. Interested in signing up for a dedicated account number?
Learn More

CD4/CD25 Mouse anti-Human, FITC, PE, eBioscience™ Non-distribution product as customer accommodation.

Antibody Cocktail



Antigen CD4/CD25
Clone RPA-T4, BC96
Target Species Human
Conjugate FITC, PE
Isotype IgG1, kappa
View More Specs

Products 1
Catalog Number Mfr. No. Quantity Price Quantity & Availability  
Catalog Number Mfr. No. Quantity Price Quantity & Availability  
50-154-21 Non-distribution product as customer accommodation. View Documents Invitrogen
25 Tests Each for $166.00
Add to cart


Description: This product consists of two fluorochrome-conjugated monoclonal antibodies to identify CD4+CD25+ human peripheral blood cells. The RPA-T4 monoclonal antibody (mouse IgG1, kappa) reacts with human CD4, a 59 kDa cell surface receptor that is expressed by a majority of thymocytes, a subpopulation of mature T cells (T helper cells) and at low levels on monocytes. The BC96 monoclonal antibody (mouse IgG1, kappa) reacts with human CD25, the 55 kDa interleukin-2 receptor alpha chain (IL-2Ralpha). This cocktail of RPA-T4 and BC96 can be used for the flow cytometric detection of human regulatory T cells, which also express Foxp3. Applications Reported: This product has been reported for use in flow cytometric analysis. Applications Tested: This cocktail has been pre-titrated and tested by flow cytometric analysis of normal human peripheral blood cells. This can be used at 20 µL per test (containing 1 µg of Anti-Human CD4 (RPA-T4) FITC and 0.125 µg of Anti-Human CD25 (BC96) PE). A test is defined as the amount (µg) of antibody that will stain a cell sample in a final volume of 100 µL. Cell number should be determined empirically but can range from 10^5 to 10^8 cells/test.

The CD4 antigen is involved in the recognition of the type II MHC antigen. It is also a receptor for HIV. It is present on most T helper cells and normal thymocytes. The cytoplasmic portion of CD4 is associated with p56lck tyrosine kinase. CD4 expression is commonly found in human lymph nodes and tonsils. CD44 is a type 1 transmembrane glycoprotein also known as Phagocytic Glycoprotein-1 (pgp-1) and HCAM. CD44 is the receptor for hyaluronate and exists as a large number of different isoforms due to alternative RNA splicing. The major isoform expressed on lymphocytes, myeloid cells, and erythrocytes is a glycosylated type 1 transmembrane protein. Other isoforms contain glycosaminoglycans and are expressed on hematopoietic and non-hematopoietic cells. CD44 is involved in adhesion of leukocytes to endothelial cells, stromal cells, and the extracellular matrix. CD25: IL2 receptor alpha (IL2RA) and beta (IL2RB) chains, together with the common gamma chain (IL2RG), constitute the high-affinity IL2 receptor. Homodimeric alpha chains (IL2RA) result in low-affinity receptor, while homodimeric beta (IL2RB) chains produce a medium-affinity receptor. Normally an integral-membrane protein, soluble IL2RA has been isolated and determined to result from extracellular proteolyisis. Alternately-spliced IL2RA mRNAs have been isolated, but the significance of each is presently unknown. Mutations in this gene are associated with interleukin 2 receptor alpha deficiency.


IgG1, kappa
PBS with 0.2% BSA and 0.09% sodium azide; pH 7.2
RPA-T4, BC96
Flow Cytometry
4° C, store in dark, DO NOT FREEZE!

For Research Use Only.

Provide Content Correction

The Fisher Scientific Encompass Program offers items which are not part of our distribution portfolio. These products typically do not have pictures or detailed descriptions. However, we are committed to improving your shopping experience. Please use the form below to provide feedback related to the content on this product.

Product Title

By clicking Submit, you acknowledge that you may be contacted by Fisher Scientific in regards to the feedback you have provided in this form. We will not share your information for any other purposes. All contact information provided shall also be maintained in accordance with our Privacy Policy.

Cancel Submit