Human PBMCs were treated with Recombinant Human IL-2 (202-IL,20 ng/mL) and TGF-beta (100-B,10 ng/mL) for 24 hours, then stained with (A) Rabbit anti-Human CD25/IL-2 Ra Monoclonal Antibody (Catalog # MAB10203) or (B) Rabbit IgG control antibody (MAB1050), followed by PE-conjugated Anti-Rabbit IgG Secondary Antibody (F0110) and Mouse anti-Human CD3 APC-conjugated Monoclonal Antiobdy (FAB100A). View our protocol for Staining Membrane-associated Proteins.

IL-2 binding to Human CD25/IL-2R alpha-transfected HEK293 Human Cell Line is Blocked by Human CD25/IL-2R alpha Antibody.

In a functional flow cytometry test, Recombinant Human IL-2 Biotinylated protein (BT202, 100 ng/mL) binds to HEK293 human embryonic kidney cell line transfected with recombinant human CD25/IL-2R alpha. (A) Binding is completely blocked by 2.5 µg/mL of Human Anti-Human CD25/IL-2R alpha Monoclonal Antibody (Catalog # MAB10203) but not by (B) Rabbit IgG Isotype Control (MAB1050) at the same concentration. Ligand binding was detected by staining cells with APC-conjugated Streptavidin (F0050).

Applications for Human CD25/IL-2R alpha Antibody

Application

Recommended Usage

Blockade of Receptor-ligand Interaction

In a functional flow cytometry test, biotinylated recombinant human IL-2 (100 ng/mL, Catalog # BT202) binds to HEK293 human embryonic kidney cell line transfected with human CD25/IL-2Ra. Binding is blocked by 2.5 μg/mL of Mouse Anti-Human CD25/IL-2Ra Monoclonal Antibody (Catalog # MAB10203).

ELISA

This antibody functions as an ELISA capture antibody when paired with Human CD25/IL-2R alpha Monoclonal Antibody (Catalog # MAB11225). This product is intended for assay development on various assay platforms requiring antibody pairs.

Flow Cytometry

0.25 µg/mL
Sample: Human PBMCs treated with Recombinant Human IL-2 (Catalog # 202-IL,20 ng/mL) and TGF-beta (Catalog # 100-B,10 ng/mL) for 24 hours,Catalog # BT202

Please Note: Optimal dilutions of this antibody should be experimentally determined.

Formulation, Preparation, and Storage

Purification

Protein A or G purified from cell culture supernatant

Reconstitution

Reconstitute at 0.5 mg/mL in sterile PBS. For liquid material, refer to CoA for concentration.

Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.

Shipping

Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store immediately at the temperature recommended below.

Stability & Storage

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.

12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: CD25/IL-2R alpha

Human IL-2 receptor alpha (IL-2R alpha), also known as Tac antigen and as CD25, was initially identified as a 55 kDa membrane glycoprotein that is capable of binding IL-2. The IL-2R alpha cDNA encodes a 272 amino acid residue precursor Type I membrane protein with a 21 residue signal peptide, a 219 residue extracellular region, a 19 residue transmembrane region and a 13 residue cytoplasmic domain. IL-2R alpha lacks structural features characteristic of members of the cytokine receptor superfamily. By itself, IL-2R alpha binds IL-2 with low affinity. However, when IL-2R alpha is associated with the IL-2R beta and gamma chains, a high affinity heterotrimeric receptor complex that transduces IL 2 signals is formed.

Long Name

Interleukin 2 Receptor alpha

Alternate Names

CD25, IL-2 R alpha, IL-2Ra, IL2R alpha, IL2RA

Entrez Gene IDs

3559 (Human); 16184 (Mouse); 25704 (Rat); 403870 (Canine); 102123605 (Cynomolgus Monkey)

Gene Symbol

IL2RA

UniProt

P01589

Additional CD25/IL-2R alpha Products

Product Documents for Human CD25/IL-2R alpha Antibody

Product Datasheets

Download Product Datasheets

COA

SDS

Download SDS

Product Specific Notices for Human CD25/IL-2R alpha Antibody

For research use only

Citations
Reviews

Calculators
Flow Cytometry

Human CD25/IL-2R alpha Antibody

R&D Systems, part of Bio-Techne | Catalog # MAB10203

Key Product Details

Validated by

Species Reactivity

Applications

Label

Antibody Source

View all CD25/IL-2R alpha Antibodies »

Product Specifications

Immunogen

Specificity

Clonality

Host

Isotype

Scientific Data Images for Human CD25/IL-2R alpha Antibody

Detection of CD25/IL-2 R alpha in Human PBMCs by Flow Cytometry.