RecombinantCNTF, Human

• Description:

  Ciliary Neurotrophic Factor (CNTF) is a cytokine belonging to the Interleukin 6 (IL-6) family, which also includes IL-6, Oncostatin M, Leukemia Inhibitory Factor (LIF), and Cardiotrophin-1. Structurally, CNTF resembles a four-helix bundle composition, similar to the other members of the IL-6 family. The receptor for CNTF is composed of three parts: a gp130-like subunit common in the IL-6 receptor family, a LIF Receptor β subunit, and a CNTF specific α receptor subunit. Upon binding to the CNTF, the β subunit of the CNTF receptor will undergo tyrosine phosphorylation, and activate the intracellular JAK/STAT pathway. The main function of CNTF in vivo is to promote the differentiation and survival of a variety of neurons and glial cells, including sympathetic precursor cells and spinal motor neurons.Recombinant human Ciliary Neurotrophic Factor (rhCNTF) produced in E. coli is a single non-glycosylated polypeptide chain containing 199 amino acids. A fully biologically active molecule, rhCNTF has a molecular mass of 22.8 kDa analyzed by reducing SDS-PAGE and is obtained by proprietary chromatographic techniques at GenScript.

• Endotoxin:

  < 0.2 EU/μg, determined by LAL method.

• Purity:

  > 95% as analyzed by SDS-PAGE and HPLC.

• Bioactivity:

  ED50 < 200 ng/ml, measured cell proliferation assay using TF-1 cells, corresponding to a specific activity of > 5x10ˆ3 units/mg.

• Reconstitution:

  Reconstituted in ddH2O or PBS at 100 μg/ml.

• Molecular Weight:

  22.8 kDa, observed by reducing SDS-PAGE.

• Storage Conditions:

  Lyophilized recombinant human Ciliary Neurotrophic Factor (rhCNTF) remains stable up to 6 months at -80°C from date of receipt. Upon reconstitution, rhCNTF remains stable up to 2 weeks at 4°C or up to 3 months at -20°C.

• Appearance:

  Sterile Filtered White lyophilized (freeze-dried) powder.

• Formulation:

  Lyophilized after extensive dialysis against PBS.

• Host or Source:

  Escherichia coli.

• Recommended Usage:

  This material is offered by USA Bioworld biotech for research, laboratory or further evaluation purposes. For research use only.

• CAS Number:

  9000-83-3

• AA Sequence:

  AFT EHSPLTPHRR DLCSRSIWLA RKIRSDLTAL TESYVKHQGL NKNINLDSAD GMPVASTDQW SELTEAERLQ ENLQAYRTFH VLLARLLEDQ QVHFTPTEGD FHQAIHTLLL QVAAFAYQIE ELMILLEYKI PRNEADGMPI NVGDGGLFEK KLWGLKVLQE LSQWTVRSIH DLRFISSHQT GIPARGSHYI ANNKKM