Based on its helical structure, LIF (Leukemia Inhibitory Factor) is considered a member of the Interleukin-6 family of cytokines. Functionally, it has been implicated in a many physiological processes including development, hematopoiesis, bone metabolism, and inflammation. Some cell types known to express LIF include activated T cells, monocytes, astrocytes, osteoblasts, keratinocytes, regenerating skeletal muscle, mast cells, and fibroblasts. ||Source:|Recombinant protein corresponding to Pro24-Phe202 from human LIF, expressed in E. coli.||Molecular Weight: |~19.6kD||Biological Activity:|Measured by its ability to induce IL-6 secretion by M1 mouse myeloid leukemia cells. The ED50 for this effect is ~0.5ng/ml.| |Endotoxin: |<0.1EU/1ug (LAL)||Storage and Stability:|Lyophilized powder may be stored at -20°C. Stable for 12 months at -20°C. Reconstitute with sterile buffer. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Reconstituted product is stable for 6 months at -20°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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