Flt3-Ligand is a growth factor that regulates proliferation of early hematopoietic cells. Flt3-Ligand binds to cells expressing the tyrosine kinase receptor Flt3. Flt3-Ligand, by itself does not stimulate proliferation of early hematopoietic cells, but synergizes with other CSFs and interleukins to induce growth and differentiation. Unlike SCF, Flt3-Ligand exerts no activity on mast cells. Multiple isoforms of Flt3-Ligand have been identified. The predominant biologically active form is anchored to the cell surface as the extracellular domain of a transmembrane protein (209 a.a.). The membrane-bound isoform can be proteolytically cleaved to generate a biologically active soluble isoform. Recombinant Human Flt3-Ligand is a soluble 17.6 kDa protein consisting of 155 amino acid residues.
Fms-related tyrosine kinase 3 ligand, Flt3L
TQDCSFQHSP ISSDFAVKIR ELSDYLLQDY PVTVASNLQD EELCGGLWRL VLAQRWMERL KTVAGSKMQG LLERVNTEIH FVTKCAFQPP PSCLRFVQTN ISRLLQETSE QLVALKPWIT RQNFSRCLEL QCQPDSSTLP PPWSPRPLEA TAPTA
≥ 98% by SDS-PAGE gel and HPLC analyses.
The ED50 was determined by the dose-dependent stimulation of the proliferation of human AML5 cells is ≤ 1.0 ng/ml, corresponding to a specific activity of ≥ 1 x 106 units/mg. This product has been tested against the WHO standard. International Unit information can be found here.
Calculated Molecular Weight:
Endotoxin level is < 0.1 ng/ug of protein (< 1 EU/ug)
Not for human use.