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Recombinant Human CNTF Protein

   
Ciliary Neurotrophic Factor  

CNTF is a neurotrophic factor that promotes the survival of various neuronal cell types and may play an important role in the injury response in the nervous system. CNTF, like FGF acidic, FGF basic and PD-ECGF (platelet-derived endothelial cell growth factor), does not possess a signal sequence that would allow secretion of the factor by classical secretion pathways (endoplasmatic reticulum/Golgi system). The mechanism underlying the release of CNTF is unknown. Recombinant Human CNTF is a single, non-glycosylated polypeptide chain.

 

The activity can be determined by the dose-dependent stimulation of TF-1 cells and is typically less than 25 ng/ml. This corresponds to the specific activity of 4 x 105 units/mg.

         
199 αα  22.7 kDa P26441 >98% E. coli -20°C


Physical Appearance

Sterile filtered white lyophilized (freeze-dried) powder.

Formulation

Lyophilized from a sterile filtered solution containing 10 mM Na2PO4, pH 7.5.

Reconstitution

Centrifuge vial before opening. When reconstituting the product, gently pipet and wash down the sides of the vial to ensure full recovery of the protein into solution. It is recommended to reconstitute the lyophilized product with sterile water at a concentration of 0.1 mg/ml, which can be further diluted into other aqueous solutions. 

Stability

Lyophilized product is very stable at -20°C. Reconstituted material should be aliquoted and frozen at -20°C. It is recommended to add a carrier protein (0.1% HSA or BSA) for long term storage.

Protein Content determined by

UV spectroscopy at 280 nm. Analysis by HPLC calibrated against a known standard. Quantitation on SDS-PAGE against a known standard.

Endotoxin Level

Endotoxin level as measured by LAL is <0.01 ng/ug or <0.1 EU/ug.

Alternative Names

Ciliary Neurotrophic Factor

AA Sequence

MAFTEHSPLT PHRRDLCSRS IWLARKLRSD LTALTESYVK HQGLNKNINL DSADGMPVAS TDQWSELTEA ERLQENLQAY RTFHVLLARL LEDQQVHFTP TEGDFHQAIH TLLLQVAAFA YQIEELMILL EYKIPRNEAD GMPINVGDGG LFEKKLWGLK VLQELSQWTV RSIHDLRFIS SHQTGIPARG SHYIANNKKM

 

RESEARCH USE ONLY