(GMP-TL509) Recombinant Human IL-21 Protein, 50μg
Beschreibung
Product Information
Protein sequence: A DNA sequence encoding the extracellular domain of human IL-21（Q9HBE4-1：Q29-S162）was expressed with the C-terminal fused Fc region of human IgG1.
Expression Host: CHO cells
QC Testing Purity: > 95 % as determined by SDS-PAGE
Activity: Measured by its ability of inducing human natural killer lymphoma NK-92 cells to secrete interferon-γ. The expected ED50 is ≤ 50 ng/ml
Endotoxin: < 0.01 EU per μg of the protein as determined by the LAL method.
Molecular Mass: The recombinant human IL-21 predicts a molecular mass of 41.9 kD.
Formulation: Lyophilized from sterile PBS, pH 7.4. Normally 6 % mannitol are added as protectants before lyophilization.
Stability & Storage: Lyophilized preparation can be stored at -20 ℃. 6 months at -20℃ under sterile conditions after reconstitution. 12 months at -80℃ under sterile conditions after reconstitution. Recommend to aliquot the protein into smaller quantities after reconstituting with water for injection, normal saline or PBS, and keep the diluted concentration above 100μg/mL. Avoid repeated freeze-thaw cycles.