SCF protein.Stem Cell Factor (SCF) plays an important role inhematopoiesis and the survival, proliferation, and differentiation of mast cells, melanocytes, and germ cells.SCF mediates its biological effects by binding to andactivating a receptor tyrosine kinase designated c-kit orSCF receptor (SCFR).SCF is also known as mast cell growth factor (MCGF),steel (Sl) factor (SLF), or kit ligand (KL).Recombinant mouse SCF produced in E. coli is a single,non-glycosylated polypeptide chain containing164 amino acids and having a molecular mass of 18.3kDa.The SCF is purified by proprietary chromatographictechniques. MW: 18.3 kDa. Purity > 95% pure by SDS-PAGE and RP-HPLC