Catalog Number:  C22-102-01
Source:  Escherichia coli.
Molecular Weight:  Approximately 18.4 kDa, a single non-glycosylated polypeptide chain containing 164 amino acids.
Quantity:  2_g/10_g/1000_g
AA Sequence:  EGICRNRVTN NVKDVTKLVA NLPKDYMITL KYVPGMDVLP SHCWISEMVV
 QLSDSLTDLL DKFSNISEGL SNYSIIDKLV NIVDDLVECV KENSSKDLKK SFKSPEPRLF
 TPEEFFRIFN RSIDAFKDFV VASETSDCVV SSTLSPEKDS RVSVTKPFML PPVA
Purity:  >97% by SDS-PAGE and HPLC analyses.
Biological Activity:  Fully biologically active when compared to standard. The ED50 determined by a cell proliferation assay using human TF-1 cells is less than 3 ng/ml, corresponding to a specific activity of＞3.3 ×105 IU/mg.
Physical Appearance: Sterile Filtered White lyophilized (freeze-dried) powder.
Formulation: Lyophilized from a 0.2μm filtered concentrated solution in PBS, pH 7.4. 
Endotoxin: Less than 1EU/μg of rHuSCF as determined by LAL method.
Reconstitution:  We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute in sterile distilled water or aqueous buffer containing 0.1% BSA to a concentration of 0.1-1.0 mg/ml. Stock solutions should be apportioned into working aliquots and stored at <-20°C. Further dilutions should be made in appropriate buffered solutions.
Storage:  This lyophilized preparation is stable at 2-8°C, but should be kept at -20°C for long term storage,
 preferably desiccated. Upon reconstitution, the preparation is stable for up to one week at 2-8°C. For
 maximal stability, apportion the reconstituted preparation into working aliquots and store at -20°C to
 -70°C. Avoid repeated freeze/thaw cycles.
Usage:  This material is offered by Shanghai Corning Bio-Tech for research, laboratory or further
 evaluation purposes. NOT FOR HUMAN USE.

Human Stem Cell Factor
C-kit ligand, the recently identified ligand for the kit tyrosine kinase receptor, is mapped to the mouse S1 locus. This pleiotropic
cytokine, alternately known as stem cell factor (SCF), mast cell growth factor (MGF) and steel-factor (SLF), plays essential roles
in gametogenesis, melanogenesis and early stages of hematopoiesis. In vitro and in vivo, SCF can stimulate the proliferation of
mature, as well as the proliferation and maturation of immature, mast cells. On purified primitive human and mouse
hematopoietic precursors, SCF acts in a synergistic manner with various growth factors, such as IL-1, IL-3, IL-6, IL-7, and Epo,
to induce myeloid, erythroid and lymphoid lineage colony formation. The finding that SCF is also expressed in the nervous
system suggests a possible role for SCF in the development of the nervous system.