IL-1b is a proinflammatory cytokine produced in a variety of cells including monocytes, tissue macrophages, keratinocytes and other epithelial cells. Both IL-1a and IL-1b binds to the same receptor and has similar biological properties. These cytokines have a broad range of activities including, stimulation of thymocyte proliferation, B-cell maturation and proliferation, mitogenic FGF-like activity and stimulation of the release of prostaglandin and collagenase from synovial cells. However, whereas IL-1b is a secreted cytokine, IL-1a is predominantly a cell-associated cytokine. Recombinant rat IL-1b is a 17.4kD protein containing 153aa residues.
Source:
Recombinant corresponding to rat IL-1b expressed in E.coli.
Molecular Weight:
~17kD
Biological Activity:
The ED50 as determined by the dose-dependent stimulation of murine D10S cells is ~0.1ng/ml, corresponding to a specific activity of ~1x10e7 units/mg
Endotoxin:
~0.1ng/ug
Storage and Stability:
Lyophilized powder may be stored at -20 degrees C. Stable for 12 months at -20 degrees C. Reconstitute with ddH2O. Aliquot to avoid repeated freezing and thawing. Store at -20 degrees C. Reconstituted product is stable for 6 months at -20 degrees C. 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.
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