Fully biologically active when compared to standard. The ED50 as determined by a cell proliferation assay using human TT medullary thyroid cancer cells is less than 0.1ng/ml, corresponding to a specific activity of >1.0×107IU/mg.
Physical Appearance
Sterile Filtered White lyophilized (freeze-dried) powder.
Formulation
Lyophilized from a 0.2μm filtered concentrated solution in 30% ACN, 0.1% TFA, 150mM NaCl.
Endotoxin
Less than 0.1EU/μg of rMuPersephin as determined by LAL method.
Reconstitution
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute in sterile distilled water or aqueous buffer containing 0.1% BSA to a concentration of 0.1-1.0mg/ml. Stock solutions should be apportioned into working aliquots and stored at ≤-20℃. Further dilutions should be made in appropriate buffered solutions.
Category
Cytokine
Background
Persephin belongs to the GDNF ligand subfamily of the TGF-beta superfamily. It promotes the survival and growth of central dopaminergic and motor neurons, and also is involved in kidney development. But persephin does not support survival of peripheral neurons.