IL-1 is a name that designates two proteins, IL-1a and IL-1b, that are the products of distinct genes, but recognize the same cell surface receptors. Both proteins are produced by a wide variety of cells in response to stimuli such as those produced by inflammatory agents, infections, or microbial endotoxins. The proteins are synthesized as 31 kDa precursors that are subsequently cleaved into proteins with molecular weights of approximately 17.5 kDa. Mature human and mouse IL-1a share approximately 75% amino acid sequence identity and human IL-1b has been found to be active on mouse cell lines. IL-1a and IL-1b are potent pro-inflammatory cytokines that induce a wide variety of biological activities on different cell types. The 156 amino acid residue recombinant protein has a predicted molecular mass of approximately 18 kDa.
Mouse Il1a expressed in E.coli
A DNA sequence encoding the mature mouse IL-1a protein was expressed in E. coli.
CAT# CSC-CTK0071-5 (5 μg); CAT# CSC-CTK0071-25 (25 μg)
Greater than 97% as determined by SDS-PAGE and visualized by silver stain
Activity was determined in a cell proliferation assay using the mouse helper T cell line, D10.G4.1 and the ED50 for this effect was typically 3 - 7 pg/mL.
Endotoxin level less than 0.1 ng per 1mg of the cytokine as determined by the LAL method.
Lyophilized from a sterile solution in PBS containing 50 mg of bovine serum albumin per 1mg of cytokine.
It is recommended that sterile PBS containing at least 0.1% human serum albumin or bovine serum albumin be added to the vial to prepare a stock solution of no less than 1 mg/mL of the cytokine.
Storage & Stability
Lyophilized samples are stable for greater than six months at -20°C to -70°C. Reconstituted mouse IL-1a can be stored under sterile conditions at 2°C to 4°C for one month or at -20°C to -70°C for three months without detectable loss of activity. Avoid repeated freeze-thaw cycles.
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