Recombinant Human IL21 protein GMP Grade(NP_001193935) was expressed in E. coli.
Source:
E. coli
Species:
Human
Form:
Lyophilized from sterile PBS, pH 7.4, 5 % trehalose, 5 % mannitol and 0.01% Tween80.
Bio-activity:
Measured by its ability to induced Interferon gamma secretion by human natural killer lymphoma NK-92 cells. The ED50 for this effect is 0.4-2 ng/mL.
Molecular Mass:
The GMP recombinant human IL-21 consists of 134 amino acids and has a calculated molecular mass of 15.6 kDa.
Endotoxin:
Less than 0.01 EU per μg determined by the LAL method.
Purity:
Greater than 95 % as determined by SDS-PAGE.
Storage:
Samples are stable for up to twelve months from date of receipt at -20°C to -80°C. Store it under sterile conditions at -20°C to -80°C. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
Reconstitution:
It is recommended that sterile water be added to the vial to prepare a stock solution of 0.2 ug/ul. Centrifuge the vial at 4°C before opening to recover the entire contents.
Not For Human Consumption!
