- SynonymKITLG,FPH2,KL-1,Kitl,MGF,SCF,SF,SHEP7,KL
- SourceBiotinylated Human SCF, Avitag,His Tag (SCF-H82E1) is expressed from human 293 cells (HEK293). It contains AA Glu 26 - Ala 190 (Accession # AAH69797).Predicted N-terminus: Glu 26Request for sequence
- Molecular Characterization

This protein carries an Avi tag (Avitag™) at the C-terminus, followed by a polyhistidine tag.
The protein has a calculated MW of 21.7 kDa. The protein migrates as 26-38 kDa under reducing (R) condition (SDS-PAGE) due to different glycosylation.
- BiotinylationBiotinylation of this product is performed using Avitag™ technology. Briefly, the single lysine residue in the Avitag is enzymatically labeled with biotin.
- Biotin:Protein RatioThe biotin to protein ratio is 0.5-1 as determined by the HABA assay.
- EndotoxinLess than 1.0 EU per μg by the LAL method.
- Purity
>95% as determined by SDS-PAGE.
- Formulation
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4. Normally trehalose is added as protectant before lyophilization.
Contact us for customized product form or formulation.
- Reconstitution
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
- Storage
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
- -20°C to -70°C for 12 months in lyophilized state;
- -70°C for 3 months under sterile conditions after reconstitution.

Biotinylated Human SCF, Avitag,His Tag on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 95%.

Immobilized Human CD117, Fc Tag (Cat. No. CD7-H5255) at 2 μg/mL (100 μL/well) can bind Biotinylated Human SCF, Avitag,His Tag (Cat. No. SCF-H82E1) with a linear range of 0.1-3 ng/mL (QC tested).
- BackgroundKit ligand (KITLG) is also known as stem cell factor (SCF), mast cell growth factor (MGF), steel factor (SF), which belongs to the SCF family, and is a widely expressed 28 - 40 kDa type I transmembrane glycoprotein. KITLG is the ligand for the receptor-type protein-tyrosine kinase KIT. SCF / MGF plays an essential role in the regulation of cell survival and proliferation, hematopoiesis, stem cell maintenance, gametogenesis, mast cell development, migration and function, and in melanogenesis. KITLG / SCF binding can activate several signaling pathways. KITLG / SF Promotes phosphorylation of PIK3R1, the regulatory subunit of phosphatidylinositol 3-kinase, and subsequent activation of the kinase AKT1. KITLG / SCF and KIT also transmit signals via GRB2 and activation of RAS, RAF1 and the MAP kinases MAPK1/ERK2 and/or MAPK3/ERK1. KITLG / SCF and KIT promote activation of STAT family members STAT1, STAT3 and STAT5. KITLG / SCF and KIT promote activation of PLCG1, leading to the production of the cellular signaling molecules diacylglycerol and inositol 1, 4, 5 - trisphosphate. KITLG / SCF acts synergistically with other cytokines, probably interleukins.
- References
- (1)Anderson DM, et al., 1991, Cell Growth Differ. 2 (8): 373–8.
- (2)Broudy VC, 1997, Blood 90 (4): 1345–64.
- (3)Blouin R, Bernstein A, 1993, In Freedman MH, Feig SA.Boca Raton: CRC Press.
- (4)Kent D, et al., 2008, Clin. Cancer Res. 14 (7): 1926–30.
Please contact us via TechSupport@acrobiosystems.com if you have any question on this product.
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是这个文献nanomedicine 2009;5:73-82
Karmali写的
神经胶质细胞(neuroglia cell)简称神经胶质(neuroglia ),广泛分布于中枢和周围神经系统.普通染色只能显示胞核,用特殊银染方法才能显示神经胶质细胞整体形态.神经胶质细胞一般较神经细胞小,突起多而不规则,数量约为神经细胞的十倍.多分布在神经元胞体、突起以及中枢神经毛细血管的周围.神经胶质细胞具有支持.一营养、保护、髓鞘形成及绝缘,并有分裂增殖与再生修复等多种作用.
(-)中枢神经系统的神经胶质细胞
1.星形胶质细胞(astrocyte)是胶质细胞中最大的一种,胞体呈星形,核大呈圆形或椭圆形,染色较浅.胞质内有交织走行的神经胶质丝(neuroglial filament).由胞体伸出许多呈放射状走行的突起,部分突起末端膨大形成脚板(end foot),附着在毛细血管基膜上,或伸到脑和脊髓的表面形成胶质界膜(gliolimitan).星形胶质细胞约占全部胶质细胞的20%.星形
胶质细胞依其分布及结构又可分为两种.
(1)原浆性星形胶质细胞(protoplasmie astrocyte):分布于中枢神经系统的灰质内,位于神经细胞体及其突起的周围.原浆性星形胶质细胞的突起不规则,分支多而短曲,表面不光滑.胞质内的神经胶质丝少.
(2)纤维性星形胶质细胞(fibrous astrocyte):分布于白质内,位于神经纤维之间.其突起呈放射状,细长而直,分支少,表面光滑.胞质内有许多交织排列的原纤维,其超微结构是一种中间丝,称神经胶质丝,其内含有胶质原纤维酸性蛋白(glial fibrillary acidic protein GFAP),用免疫细胞化学染色技术能特异性地显示出这类细胞.
星形胶质细胞含有高浓度的K+,并能摄取某些神经递质(如γ-氨基丁酸).它通过调节细胞间隙的K+和神经递质浓度,来影响神经元的功能活动.因此,星形胶质细胞对维持神经细胞微环境的稳定和调节代谢过程起重要作用.当中枢神经系统损伤时,星形胶质细胞迅速分裂增殖,以形成胶质瘢痕形式进行修复.
Thy-1、c-kit散在分布于HB组织中,主要集中在汇管区,而正常肝脏组织中不表达;CD34及SCF在HB中的表达明显高于正常肝脏组织(P0.05),其中CD34主要在血管内皮系统中分布,SCF主要表达在汇管区;CD56表达于成簇的神经纤维组织中,在HB及正常肝脏组织中表达差异无统计学意义(P0.05)。结论不同干细胞相关表面标志物分布于HB组织中,并且集中表达在特定区域。表达Thy-1/c-kit阳性细胞可能对HB的发生起一定作用。

