Cotton Rat IFN-alpha Antibody

Catalog #: AF1082
1 Citation Datasheet / COA / SDS

Catalog #	Availability	Size / Price	Qty
AF1082
AF1082-SP

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IFN‑ alpha Inhibition of EMCV-induced Cytopathy and Neutralization by Cotton Rat IFN‑ alpha Antibody.

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Cotton Rat IFN-alpha Antibody Summary

Species Reactivity

Cotton Rat

Specificity

Detects cotton rat IFN-alpha in direct ELISAs and Western blots. In direct ELISAs and Western blots, less than 2% cross-reactivity with recombinant human IFN-beta and recombinant cotton rat IFN-gamma is observed.

Source

Polyclonal Goat IgG

Purification

Antigen Affinity-purified

Immunogen

E. coli-derived recombinant cotton rat IFN-alpha
Cys24-Lys190 (Cys109Tyr)
Accession # AAL18816

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.

Endotoxin Level

<0.10 EU per 1 μg of the antibody by the LAL method.

Applications

Recommended Concentration

Sample

Western Blot

0.1 µg/mL

Recombinant Cotton Rat IFN-alpha (Cys109Tyr) (Catalog # 1082-CR)

Neutralization

Measured by its ability to neutralize IFN‑ alpha inhibition of EMCV-induced cytopathy in the LCRT cotton rat fibrosarcoma cell line. Vogel, S. and M. Hogan (1995) in Current Protocols in Immunology. Ciocio, R. (ed); John Wiley & Sons, Inc. p. 6. 9. 1. The Neutralization Dose (ND₅₀) is typically 0.015-0.065 µg/mL in the presence of 0.2 ng/mL Recombinant Cotton Rat IFN‑ alpha (Cys109Tyr).

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.

Scientific Data

Neutralization

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IFN‑ alpha Inhibition of EMCV-induced Cytopathy and Neutralization by Cotton Rat IFN‑ alpha Antibody. Recombinant Cotton Rat IFN-a (Cys109Tyr) (Catalog # 1082-CR) reduces the Encephalomyocarditis Virus (EMCV)-induced cytopathy in the LCRT cotton rat fibrosarcoma cell line in a dose-dependent manner (orange line), as measured by crystal violet staining. Inhibition of EMCV activity elicited by Recombinant Cotton Rat IFN-a (Cys109Tyr) (0.2 ng/mL) is neutralized (green line) by increasing concentrations of Goat Anti-Cotton Rat IFN-a Antigen Affinity-purified Polyclonal Antibody (Catalog # AF1082). The ND₅₀ is typically 0.015-0.065 µg/mL.

Reconstitution Calculator

Preparation and Storage

Reconstitution

Reconstitute at 0.2 mg/mL in sterile 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: IFN-alpha

Interferon-alpha, also known as leukocyte interferon, comprises a group of related but distinct proteins that share over 95% amino acid sequence homology. They are members of the type I interferon family which share a common cell surface receptor composed of two subunits, a 100 kDa ligand-binding subunit (IFN-alpha R1) and a 125 kDa subunit (IFN-alpha R2) that is involved both in ligand-binding and signal transduction. IFN-alpha is expressed primarily by leukocytes upon activation by viruses, bacteria, cytokines and growth factors. IFN-alpha has been shown to have anti-viral and immunomodulatory activities on target cells. It can also inhibit cell proliferation as well as induce apoptosis (1, 2).

Cotton rat IFN-alpha 1 cDNA encodes a 189 amino acid (aa) residue precursor protein with a putative 23 aa signal sequence and a 166 aa mature protein. The protein contains five cysteines, four of which are involved in two intrachain disulfide bonds. Cotton rat IFN-alpha 1 shares 52%, 67%, 68% and 72% aa sequence identity to human, rat, hamster and mouse IFN-alpha 1, respectively.

References

Domanski, P. and O.R. Colamonici (1996) Cytokine Growth Factor Rev. 7:143.
Pestka, S. (2000) Biopolymers 55:254.

Long Name

Interferon alpha

Entrez Gene IDs

3440 (Human)

Alternate Names

IFNA; IFNA2; IFNA2b; IFNalpha; IFN-alpha; IFN-alphaA; INFA2; interferon alpha 2; LeIF D

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Citation for Cotton Rat IFN-alpha 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.

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