Recombinant Rat CNTF Protein

R&D Systems | Catalog # 557-NT

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Key Product Details

  • R&D Systems E. coli-derived Recombinant Rat CNTF Protein (557-NT)
  • Quality control testing to verify active proteins with lot specific assays by in-house scientists
  • All R&D Systems proteins are covered with a 100% guarantee

Source

E. coli

Accession Number

P20294.1

Applications

Bioactivity
View all CNTF Proteins and Enzymes »

Product Specifications

Source

E. coli-derived rat CNTF protein
Ala2-Met200

Purity

>97%, by SDS-PAGE under reducing conditions and visualized by silver stain.

Endotoxin Level

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

N-terminal Sequence Analysis

Ala2

Predicted Molecular Mass

22.8 kDa

Activity

Measured in a cell proliferation assay using TF‑1 human erythroleukemic cells. Kitamura, T. et al. (1989) J. Cell Physiol. 140:323.
The ED50 for this effect is 3‑15 ng/mL.

Measured by its ability to support the survival and stimulate neurite outgrowth of dissociated chick embryonic dorsal root ganglia (DRG) neurons. Davies, A.M. (1989) in Neurotrophic Factor Bioassay Using Dissociated Neurons, Nerve Growth Factor. Rush, R.A. (eds): John Willey and Sons, Ltd. 95.
The ED50 for this effect is 0.1-0.3 ng/mL.

Reviewed Applications

Read 1 review rated 5 using 557-NT in the following applications:

Formulation, Preparation, and Storage

Carrier Free
What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

Carrier: 557-NT
Formulation Lyophilized from a 0.2 μm filtered solution in Tris, NaCl, TCEP, EDTA, CHAPS and Trehalose with BSA as a carrier protein.
Reconstitution Reconstitute at 100 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin.
Shipping 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.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.
Carrier Free: 557-NT/CF
Formulation Lyophilized from a 0.2 μm filtered solution in Tris, NaCl, TCEP, EDTA, CHAPS and Trehalose.
Reconstitution Reconstitute at 100 μg/mL in sterile PBS.
Shipping 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.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.

Calculators

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

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Background: CNTF

Ciliary neurotrophic factor (CNTF) is a polypeptide initially purified from chick embryo ocular tissue and identified as a trophic factor for embryonic chick ciliary parasympathetic neurons in culture. Subsequent studies have demonstrated that CNTF is a survival factor for additional neuronal cell types including: dorsal root ganglion sensory neurons, sympathetic ganglion neurons, embryonic motor neurons, major pelvic ganglion neurons and hippocampal neurons. CNTF has also been shown to prevent the degeneration of motor axons after axotomy.

The cDNA for CNTF encodes a 200 amino acid residue polypeptide that lacks a signal sequence. CNTF is highly conserved across species and exhibits cross-species activities. Human and rat CNTF share approximately 83% homology in their protein sequence. CNTF is structurally related to IL‑6, IL-11, LIF, and OSM. All of these four helix bundle cytokines share gp130 as a signal-transducing subunit in their receptor complexes. For a list of CNTF references, see the R&D Systems’ cytokine catalog.

Long Name

Ciliary Neurotrophic Factor

Alternate Names

ciliary neurotrophic factor, HCNTF

Entrez Gene IDs

1270 (Human); 12803 (Mouse); 25707 (Rat)

Gene Symbol

CNTF

UniProt

P20294.1

Additional CNTF Products

Product Documents for Recombinant Rat CNTF Protein

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot or batch number in the search box below.

Note: Certificate of Analysis not available for kit components.

Download SDS 557-NT (with carrier)
Download SDS 557-NT/CF (carrier free)

Product Specific Notices for Recombinant Rat CNTF Protein

For research use only

Citations for Recombinant Rat CNTF Protein

Customer Reviews for Recombinant Rat CNTF Protein (1)

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  • Recombinant Rat CNTF Protein
    Name: Michelle Chen
    Application: Cell Proliferation
    Verified Customer | Posted 05/10/2017

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