Interleukin-2 (IL-2) is an interleukin, a type of cytokine signaling molecule in the immune system. It regulates the activities of white blood cells (leukocytes, often lymphocytes) that are responsible for immunity. IL-2 is part of the body's natural response to microbial infection, and in discriminating between foreign ("non-self") and "self". IL-2 mediates its effects by binding to IL-2 receptors, which are expressed by lymphocytes. The major sources of IL-2 are activated CD4+ T cells and activated CD8+ T cells.IL-2 has essential roles in key functions of the immune system, tolerance and immunity, primarily via its direct effects on T cells. In the thymus, where T cells mature, it prevents autoimmune diseases by promoting the differentiation of certain immature T cells into regulatory T cells, which suppress other T cells that are otherwise primed to attack normal healthy cells in the body.

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Lyophilized powder

PBS, pH7.4, 5% trehalose

Reconstitute at no more than 1 mg/ml according to the size in ultrapure water after rapid centrifugation.

• 12 months from date of receipt, -20 to -70 °C as supplied.
• 6 months, -20 to -70 °C under sterile conditions after reconstitution.
• 1 week, 2 to 8 °C under sterile conditions after reconstitution.

Note: Please avoid repeated freeze-thaw cycles