IL-1 alpha /IL-1F1, also known as interleukin-1 alpha, is a member of the interleukin-1 cytokine family. Cytokines are protein signaling compounds that are the main mediators of the immune response. This protein is produced mainly by activated macrophages, as well as neutrophils, epithelial cells, and endothelial cells. It possesses metabolic, physiological, haematopoietic activities, and plays one of the central roles in the regulation of the immune responses. It binds to the interleukin-1 receptor. It is on the pathway that activates tumor necrosis factor-alpha. Also, it stimulates thymocyte proliferation by inducing IL-2 release, B cell maturation and proliferation. Source: Recombinant protein corresponding to aa115-270 from mouse Interleukin 1 alpha, fused to His-Tag at C-terminal, expressed in baculovirus. AA Sequence: SAPYTYQ SDLRYKLMKL VRQKFVMNDS LNQTIYQDVD KHYLSTTWLN DLQQEVKFDM YAYSSGGDDS KYPVTLKISD SQLFVSAQGE DQPVLLKELP ETPKLITGSE TDLIFFWKSI NSKNYFTSAA YPELFIATKE QSRVHLARGL PSMTDFQIS Biological Activity: Measured in a cell proliferation assay using D10.G4.1 mouse helper T cells. The ED50 range 0.15ng/ml. Storage and Stability: May be stored at 4C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20C. Aliquots are stable for 6 months after receipt at -20C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.