Human IL-2 with a substitution of cysteine-125 by serine, accession # P60568, Pro22-Thr153, N-terminal Met and C-terminal 6xHis-tag, molecular mass 16.3 kDa.

With the exception of the added C-terminal 6xHis-tag, the amino acid sequence corresponds to that of Aldesleukin.

Lyophilized from a 0.2 µm-filtered solution containing 25 mM sodium acetate and 50 mM sodium chloride, pH 5.0

Both product grades are produced under the same conditions in a GMP facility, ensuring an equal product quality and performance. We offer a more comprehensive QC testing including tighter specifications and documentation for our GMP products: Preclinical vs GMP.

Recommended in 0.2% acetic acid to a final concentration of 250 µg/ml for 50 µg vials or 500 µg/ml for 1 mg vials.

Ambient temperature. Please refer to Technote to learn more about our shipment validation procedure.

≥ 6 months from date of shipping. Please refer to Certificate of Analysis for the exact expiry date.

Store lyophilized cytokine at -20°C to -80°C.

Store a 250 µg/ml reconstituted cytokine solution:

• 4 weeks at 2°C to 8°C under sterile conditions after reconstitution. Store in the original container. 

• 4 months at -20°C to -80°C under sterile conditions after reconstitution. Store in 60 µl aliquots in polypropylene cryogenic vials.

Avoid repeated freeze/thaw cycles.