Miltenyi, 130-120-333, Mouse IL-2 IS, premium grade

Biological activity

Background information
Interleukin 2 (IL-2), a potent lymphoid cell growth factor, is a typical four α-helix bundle cytokine. IL-2 is produced by activated T cells, especially the CD4+ T helper cell population. It plays an important role in both the activation and maintenance of immune responses and in lymphocyte development. IL-2 promotes proliferation and differentiation of T cells, NK cells, and B cells and is involved in the elimination of self-reactive T cells. IL-2 signals through a receptor complex consisting of IL-2 receptor α-chain (CD25), β- and common γ-chain. The later two are also used for IL-15 signaling.

Quality description
Research-grade cytokines are suitable for a wide variety of cell culture applications. They are sterile-filtered prior to lyophilization. Generally, endotoxin levels are <0.1 ng/μg (<1 EU/μg), and purities are >95%. The biological activity is tested in appropriate bioassays.
Premium-grade cytokines offer the convenience of high and well-defined biological activities and allow exact unit dosing for demanding applications. The biological activity is determined after lyophilization and reconstitution, and normalized to WHO/NIBSC standards whenever available. In general, endotoxin levels are <0.01 ng/μg (<0.1 EU/μg), and purities are >97%. Lot-specific activities are stated in the Certificate of Analysis (www. miltenyibiotec.com/certificates).

Overview
IL-2 IS stands for interleukin 2 “improved sequence” and is a variant of IL-2 with the serine substituted for the native cysteine at amino acid position 160.
Mouse IL-2 IS is a recombinant protein optimized for use in cell culture, differentiation studies, and functional assays.