Purity: > 90% by SDS - PAGE Format: Liquid. In phosphate-buffered Saline(pH7.4) containing 10% glycerol. Interleukin (IL) -15 is a pleiotropic cytokine that plays a pivotal role in both innate and adaptive immunity. IL-15 is unique among cytokines due to its participation in a trans signaling mechanism in which IL-15 receptor alpha (IL-15R alpha) from one subset of cells presents IL-15 to neighboring IL-2R beta/gamma (c) -expressing cells. This newly discovered cytokine is produced by a wide variety of cells and tissues and like IL-2, stimulates the proliferation of T-lymphocytes and induces the generation of cytotoxicT-lymphocytes (CTLs) and lymphokine-activated killer (LAK) cells. Recombinant Mouse IL-15 was expressed in E. coli and purified by using conventional chromatography techniques.