Stem Cell Factor, Recombinant, Rat (SCF, Kit Ligand, KITLG, Mast Cell Growth Factor, MGF)
Stem Cell Factor (SCF) is a hematopoietic growth factor that exerts its activity by signaling through the c-Kit receptor. SCF and c-Kit are essential for the survival, proliferation and differentiation of hematopoietic cells committed to the melanocyte and germ cell lineages. Human SCF manifests low activity on murine cells, while murine and rat SCF are fully active on human cells. Recombinant rat SCF is an 18.4kD polypeptide containing 154aa, which corresponds to the sequence of the secreted soluble form of SCF.
Source
Recombinant protein corresponding to rat SCF, expressed in E.coli.
Biological Activity
Determined by the dose-dependent stimulation of the proliferation of the human TF-1 cell line. The ED50 was found to be <10ng/ml
Specific Activity
>1x10e5units/mg
Endotoxin
<0.1ng/ug (1EU/ug)
AA Sequence
MQEICRNPVT DNVKDITKLV ANLPNDYMIT LNYVAGMDVL PSHCWLRDMV THLSVSLTTL LDKFSNISEG LSNYSIIDKL GKIVDDLVAC MEENAPKNVK ESLKKPETRN FTPEEFFSIF NRSIDAFKDF MVASDTSDCV LSSTLGPEKD SRVSVTKPFM LPPVA
Storage and Stability
May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store 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.
Source
Recombinant, E. coli
Purity
~98% (SDS-PAGE and HPLC)
Form
Supplied as a lyophilized powder.
Important Note
This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.
