Human IL-29/IFN-lambda 1 Biotinylated Antibody

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Citations (4)
Supplemental Products
Reviews (2)

Human IL-29/IFN-lambda 1 Biotinylated Antibody Summary

Species Reactivity
Detects human IL‑29/IFN‑ lambda 1 in ELISAs and Western blots. In sandwich immunoassays, approximately 100% cross-reactivity with recombinant human (rh) IL-28B is observed, 35% cross-reactivity with rhIL-28A is observed and less than 0.2% cross‑reactivity with rhIFN‑ alpha A, rhIFN-alpha B2, rhIFN‑ alpha G, rhIFN alpha I, and rhIFN-beta 1A is observed. In Western blots, approximately 25% cross-reactivity with rhIL-28A and rhIL‑28B is observed.
Polyclonal Goat IgG
Antigen Affinity-purified
Mouse myeloma cell line NS0-derived recombinant human IL‑29/IFN‑ lambda 1
Accession # Q8IU54
Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein.


Recommended Concentration
Western Blot
0.1 µg/mL
Recombinant Human IL‑29/IFN-lambda 1 (Catalog # 1598-IL)

IL-29/IFN-lambda 1 Sandwich Immunoassay

Recommended Concentration
ELISA Detection (Matched Antibody Pair)
0.1-0.4 µg/mL 

Use in combination with:

Capture Reagent: Human IL‑29/IFN‑ lambda 1 Antibody (Catalog # MAB15981)

Standard: Recombinant Human IL-29/IFN-lambda 1 Protein (Catalog # 1598-IL)

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.

Reconstitution Calculator

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Preparation and Storage

Reconstitute at 0.2 mg/mL in sterile PBS.
Reconstitution Buffer Available
Reconstitution Buffer 1 (PBS)
Catalog #
Size / Price
The product is shipped at ambient temperature. Upon receipt, store it 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: IL-29/IFN-lambda 1

IL-28A, IL-28B, and IL-29, also named interferon-lambda 2 (IFN-lambda 2), IFN-lambda 3, and IFN-lambda 1, respectively, are class II cytokine receptor ligands that are distantly related to members of the IL-10 family (11-13% aa sequence identity) and the type I IFN family (15-19% aa sequence identity) (1-3). The genes encoding these three cytokines are localized to chromosome 19 and each is composed of multiple exons. The exon organization of these genes is also found in the IL-10 family genes but is distinct from the type I IFNs, which are encoded within a single exon, The expression of IL-28A, B, and IL‑29 is induced by virus infection or double-stranded RNA. All three cytokines exert bioactivities that overlap those of type I IFNs, including antiviral activity and up-regulation of MHC class I antigen expression. The three proteins signal through the same heterodimeric receptor complex that is composed of the IL-10 receptor  beta (IL-10 R beta ) and a novel IL-28 receptor  alpha (IL-28 R alpha, also known as IFN-lambda R1). Ligand binding to the receptor complex induces Jak kinase activation and STAT1 and STAT2 tyrosine phosphorylation. The phosphorylated STAT1 and STAT2 complex with IFN-regulatory factor 9 (IRF-9) to form the IFN-stimulated regulatory factor 3 (ISGF-3) transcription factor complex that is translocated to the nucleus. ISGF-3 binds to the IFN-stimulated response element (ISRE) present in the regulatory region of the target genes. Human IL-29 cDNA encodes a 200 amino acid (aa) residue precursor protein with a putative 19 aa signal peptide and a 181 aa mature protein, which is a monomer in solution. It shares 67% and 69% aa sequence identity with human IL-28A and IL-28B, respectively.

  1. Vilcek, J. (2003) Nature Immunol. 4:8.
  2. Sheppard, P. et al. (2003) Nature Immunol. 4:63.
  3. Kotenko, S.V. et al. (2003) Nature Immunol. 4:69.
Long Name
Interleukin 29
Entrez Gene IDs
282618 (Human)
Alternate Names
cytokine Zcyto21; IFNL1; IFN-lambda 1; IFN-lambda-1; IL29; IL-29; interferon lambda-1; interferon, lambda 1; interleukin 29 (interferon, lambda 1); interleukin-29; ZCYTO21

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Citations for Human IL-29/IFN-lambda 1 Biotinylated Antibody

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.

4 Citations: Showing 1 - 4
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  1. High levels of circulating interferons type I, type II and type III associate with distinct clinical features of active systemic lupus erythematosus
    Authors: V Oke, I Gunnarsson, J Dorschner, S Eketjäll, A Zickert, TB Niewold, E Svenungsso
    Arthritis Res. Ther., 2019-04-29;21(1):107.
    Species: Human
    Sample Types: Plasma
    Applications: ELISA Detection
  2. IFN-?1 with Th17 axis cytokines and IFN-? define different subsets in systemic lupus erythematosus (SLE)
    Authors: V Oke, S Brauner, A Larsson, J Gustafsson, A Zickert, I Gunnarsson, E Svenungsso
    Arthritis Res. Ther., 2017-06-15;19(1):139.
    Species: Human
    Sample Types: Serum
  3. Interferon (IFN)-? is a potential mediator in lupus nephritis
    Authors: Iva Gunnarsson
    Lupus Sci Med, 2016-11-22;3(1):e000170.
    Species: Human
    Sample Types: Serum
    Applications: ELISA Development (Detection)
  4. Human TLR-7-, -8-, and -9-mediated induction of IFN-alpha/beta and -lambda Is IRAK-4 dependent and redundant for protective immunity to viruses.
    Authors: Yang K, Puel A, Zhang S, Eidenschenk C, Ku CL, Casrouge A, Picard C, von Bernuth H, Senechal B, Plancoulaine S, Al-Hajjar S, Al-Ghonaium A, Marodi L, Davidson D, Speert D, Roifman C, Garty BZ, Ozinsky A, Barrat FJ, Coffman RL, Miller RL, Li X, Lebon P, Rodriguez-Gallego C, Chapel H, Geissmann F, Jouanguy E, Casanova JL
    Immunity, 2005-11-01;23(5):465-78.
    Species: Human
    Sample Types: Cell Culture Supernates
    Applications: ELISA Development


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Human IL-29/IFN-lambda 1 Biotinylated Antibody
By Anonymous on 09/12/2022
Application: ELISA Sample Tested: Serum Species: Human

Human IL-29/IFN-lambda 1 Biotinylated Antibody
By Anonymous on 06/01/2018
Application: ELISA Sample Tested: Serum Species: Human

This antibody served as the detection in a sandwich ELISA with MAB15981 as the capture.