Recombinant Human CNTF Protein
Growth factors from Cell Guidance Systems are high purity suitable for the most demanding applications where biological activity is required.
Ciliary Neurotrophic Factor, CNTF
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 produced in E.coli is a single, non-glycosylated polypeptide chain containing 199 amino acids and having a molecular mass of 22,706 Daltons.
Sterile Filtered white lyophilized (freeze-dried) powder.
Lyophilized from 10 mM NaP, pH 7.5.
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 0.1mg/ml, which can be further diluted into other aqueous solutions.
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.
Purity Greater than 98% as determined by:
Analysis by RP-HPLC.
Reducing and non-reducing SDS-PAGE.
Protein Content determined by:
UV spectroscopy at 280 nm.
Analysis by RP-HPLC calibrated against a known standard.
Quantitation on SDS-PAGE against a known standard.
Endotoxin level as measured by LAL is <0.01ng/ug or <0.1EU/ug.
Recombinant Human Ciliary Neurotrophic Factor is fully biologically active when compared to standard. The ED50 as determined by the dose-dependent stimulation of TF-1 cells is less then 1.8 ng/ml.
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RESEARCH USE ONLY