Flt3-Ligand belongs to a small group of growth factors that regulate proliferation of early hematopoietic cells. Multiple isoforms of Flt3-Ligand have been identified. The predominant form is the transmembrane which is biologically active on the cell surface. The proteolytically cleaved transmembrane isoform generates a soluble form, which is also biologically active. Flt3-Ligand binds to cells expressing the tyrosine kinase receptor Flt3. Flt3-Ligand alone cannot stimulate proliferation, but synergizes well with other CSFs and interleukins to induce growth and differentiation. ||Source:|Recombinant protein corresponding to 144aa residues from mouse Flt3-Ligand, expressed in E. coli. ||Molecular Weight: |~16.4kD||Biological Activity:|Determined by the dose-dependent proliferation of mouse AML5 cells and is typically 5-8ng/ml.||Endotoxin:|<0.1ng/ug (0.1EU/u) ||Storage and Stability:|Lyophilized powder may be stored at -20°C. Stable for 12 months after receipt at -20°C. Reconstitute with sterile ddH2O. 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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