1. Recombinant Proteins
  2. Cytokines and Growth Factors
  3. Neurotrophic Factors
  4. CNTF
  5. CNTF Protein, Human (His)

CNTF Protein, Human (His)

Cat. No.: HY-P72943
COA Handling Instructions

CNTF is a pluripotent neurotrophic factor, belonging to the IL-6 cytokine family. CNTF could protect retinal cone and rod photoreceptors. CNTF has neuroprotective effects on a variety of central and also peripheral nervous system neurons. CNTF Protein, Human (His) is produced by E. coli (A2-M200) with N-terminal His-tag.

For research use only. We do not sell to patients.

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  • Biological Activity

  • Technical Parameters

  • Properties

  • Documentation

  • References

Description

CNTF is a pluripotent neurotrophic factor, belonging to the IL-6 cytokine family[1]. CNTF could protect retinal cone and rod photoreceptors[2]. CNTF has neuroprotective effects on a variety of central and also peripheral nervous system neurons[3]. CNTF Protein, Human (His) is produced by E. coli (A2-M200) with N-terminal His-tag.

Background

Ciliary Neurotrophic Factor (CNTF) belongs to the IL-6 cytokine family. IL-6, IL-11 and CNTF are associated with cytokine trans signaling. CNTF shows a low affinity interaction with IL-6 receptor subunit alpha (IL-6Rα), leading to the formation and activation of the IL-6Rβ/gp130/LIFR signaling receptor complex[1]. CNTF is also an extracellular signaling protein in the neuroretinal and the interphotoreceptor matrix, which is associated with the membranes of the RPE, Muller and photoreceptor cells[2]. CNTF has neuroprotective effects on a variety of central and also peripheral nervous system neurons. Because it promotes differentiation and maturation of oligodendrocyte precursor cells to oligodendrocytes under in vitro conditions and thus improves remyelination. Importantly, it also increases the survival of mature oligodendrocytes[3]. The similarity of human CNTF protein sequences to mice and rats was 81.82% and 84.0%, respectively.

In Vitro

CNTF (human; 2 ng/mL; 3 d) significantly inhibits the activity of choline acetyltransferase (ChAT) in mesencephalic cultures[4].

Biological Activity

Measured in a cell proliferation assay using TF-1 human erythroleukemic cells. The ED50 for this effect is typically 1-4 μg/mL.

Species

Human

Source

E. coli

Tag

N-His

Accession

P26441 (A2-M200)

Gene ID
Molecular Construction
N-term
His
CNTF (A2-M200)
Accession # P26441
C-term
Synonyms
Ciliary neurotrophic factor; CNTF
AA Sequence

AFTEHSPLTPHRRDLCSRSIWLARKIRSDLTALTESYVKHQGLNKNINLDSADGMPVASTDQWSELTEAERLQENLQAYRTFHVLLARLLEDQQVHFTPTEGDFHQAIHTLLLQVAAFAYQIEELMILLEYKIPRNEADGMPINVGDGGLFEKKLWGLKVLQELSQWTVRSIHDLRFISSHQTGIPARGSHYIANNKKM

Molecular Weight

27-30 kDa

Purity

Greater than 90% as determined by reducing SDS-PAGE

Appearance

Solution

Formulation

Supplied as a 0.2 μm filtered solution of PBS, pH 7.4.

Endotoxin Level

<1 EU/μg, determined by LAL method.

Reconstitution

N/A.

Storage & Stability

Stored at -80°C for 1 year. It is stable at -20°C for 3 months after opening. It is recommended to freeze aliquots at -80°C for extended storage. Avoid repeated freeze-thaw cycles.

Shipping

Shipping with dry ice.

Documentation
References

CNTF Protein, Human (His) Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

  • Reconstitution Calculator

  • Dilution Calculator

  • Specific Activity Calculator

The reconstitution calculator equation

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration
= ÷

The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

The specific activity calculator equation

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)
Unit/mg = 106 ÷ ng/mL

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CNTF Protein, Human (His)
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HY-P72943
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