SCGF-α and -β are hematopoietic growth factors that exert their activity at early stages of hematopoiesis. The SCGFs are non-glycosylated species-specific cytokines that can support growth of primitive hematopoietic cells, and, in combination with EPO or GM-CSF, promote proliferation of erythroid or myeloid progenitors, respectively. Recombinant Human SCGF-β is a 25.0 kDa polypeptide containing 227 amino acid residues.
Stem Cell Growth Factor-β
GHGARGAER EWEGGWGGAQ EEEREREALM LKHLQEALGL PAGRGDENPA GTVEGKEDWE MEEDQGEEEE EEATPTPSSG PSPSPTPEDI VTYILGRLAG LDAGLHQLHV RLHALDTRVV ELTQGLRQLR NAAGDTRDAV QALQEAQGRA EREHGRLEGC LKGLRLGHKC FLLSRDFEAQ PSASPHPLSP DQPNGGTLEN CVAQASDDGS WWDHDCQRRL YYVCEFPF
≥ 98% by SDS-PAGE gel and HPLC analyses.
Determined by the dose-dependent stimulation of the proliferation of TF-1 cells previously grown in media containing GM-CSF. The ED50 for this effect was observed at ≤ 7 ng/ml.