Human Indoleamine 2,3-dioxygenase/IDO Alexa Fluor® 488-conjugated Antibody

(2 citations)   
  • Species Reactivity
  • Specificity
    Detects human Indoleamine 2,3-dioxygenase/IDO in direct ELISAs.
  • Source
    Monoclonal Mouse IgG1 Clone # 700838
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    E. coli-derived recombinant human Indoleamine 2,3-dioxygenase/IDO
    Accession # P14902
  • Formulation
    Supplied in a saline solution containing BSA and Sodium Azide.
  • Label
    Alexa Fluor 488
  • Intracellular Staining by Flow Cytometry
    5 µL/106 cells
    See below
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Data Examples
Intracellular Staining by Flow Cytometry
Detection of Indoleamine 2,3‑dioxygenase/IDO in Human MDSCs by Flow Cytometry. Human myeloid-derived suppressor cells (MDSCs) treated with 10 ng/mL Recombinant Human IL‑6 (Catalog # 206-IL) and 10 ng/mL Recombinant Human GM‑CSF (Catalog # 215-GM) for 7 days were stained with Mouse Anti-Human Siglec‑3/CD33 APC‑conjugated Monoclonal Antibody (Catalog # FAB1137A) and either (A) Mouse Anti-Human Indoleamine 2,3‑dioxygenase/IDO Alexa Fluor® 488‑conjugated Monoclonal Antibody (Catalog # IC6030G) or (B) Mouse IgG1 Alexa Fluor 488 Isotype Control (Catalog # IC002G). To facilitate intracellular staining, cells were fixed with Flow Cytometry Fixation Buffer (Catalog # FC004) and permeabilized with Flow Cytometry Permeabilization/Wash Buffer I (Catalog # FC005). View our protocol for Staining Intracellular Molecules.
Preparation and Storage
  • Shipping
    The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
  • Stability & Storage
    Protect from light. Do not freeze.
    • 12 months from date of receipt, 2 to 8 °C as supplied.
Background: Indoleamine 2,3-dioxygenase/IDO
Indoleamine 2,3-dioxygenase (also known as IDO) is a heme-containing intracellular dioxygenase catalyzing the degradation of the essential amino acid L-tryptophan to N-formyl-kynurenine (1). This degradation is the first and rate-limiting step of the L-kynurenine pathway (2). IDO is widely expressed in dendritic cells, macrophages, microglia, eosinophils, fibroblasts, endothelial cells, and most tumor cells. In immune cells, its expression is mainly induced by cytokines such as IFN‑ gamma, IFN-alpha, IFN-beta, and IL‑10. IDO has an antimicrobial function due to its decreasing the availability of the essential amino acid tryptophan in inflammatory environments (3). Recent studies have demonstrated that IDO induces immunosuppression during infection, pregnancy, transplantation, autoimmunity, and neoplasia (3-5).
  • References:
    1. Lewis-Ballester, A. et al. (2009) Proc. Natl. Acad. Sci. USA. 106:17371.
    2. Costantino, G. (2009) Expert Opin. Ther. Targets 13:247.
    3. Xu, H. et al. (2008) Immunol. Lett. 121:1.
    4. Lob, S. et al. (2009) Nat. Rev. Cancer 9:445.
    5. Curti, A. et al. (2009) Blood 113:2394.
  • Entrez Gene IDs:
    3620 (Human); 15930 (Mouse)
  • Alternate Names:
    3dioxygenase; EC; IDO1; IDOIDO-1; INDO; INDOindole 2,3-dioxygenase; Indoleamine 2; indoleamine 2,3-dioxygenase 1; indoleamine-pyrrole 2,3 dioxygenase; Indoleamine-pyrrole 2,3-dioxygenase
Related Research Areas

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

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Sample Type
  1. CD4+ T cell-derived IL-21 and deprivation of CD40 signaling favor the in vivo development of granzyme B-expressing regulatory B cells in HIV patients.
    Authors: Kaltenmeier C, Gawanbacht A, Beyer T, Lindner S, Trzaska T, van der Merwe J, Harter G, Gruner B, Fabricius D, Lotfi R, Schwarz K, Schutz C, Honig M, Schulz A, Kern P, Bommer M, Schrezenmeier H, Kirchhoff F, Jahrsdorfer B
    J Immunol, 2015;194(8):3768-77.
    Species: Human
    Sample Type: Whole Cells
    Application: Flow
  2. Induction of indoleamine 2,3-dioxygenase by Borrelia burgdorferi in human immune cells correlates with pathogenic potential.
    Authors: Love A, Schwartz I, Petzke M
    J Leukoc Biol, 2015;97(2):379-90.
    Species: Human
    Sample Type: Whole Cells
    Application: Flow
Isotype Controls
Description Application Cat# Citations Images  

Mouse IgG1 Alexa Fluor® 488-conjugated Antibody

Ctrl IC002G 2  
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Staining Reagents
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Flow Cytometry Permeabilization/Wash Buffer I (1X)

Flow FC005 4
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Flow Cytometry Fixation Buffer (1X)

Flow FC004 3
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Flow Cytometry Fixation & Permeabilization Buffer Kit I

Flow FC009
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Flow Cytometry Fixation/Permeabilization Buffer I (1X)

Flow FC007
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