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分子别名（Synonym）
FGF2,BFGF,FGFB,FGF basic,HBGF-2
表达区间及表达系统（Source）
Biotinylated Human FGF basic, Avitag,His Tag (FGC-H81E3) is expressed from E. coli cells. It contains AA Pro 143 - Ser 288 (Accession # P09038-4).
Predicted N-terminus: Met
Request for sequence
蛋白结构（Molecular Characterization）
This protein carries an Avi tag (Avitag™) at the N-terminus, followed by a polyhistidine tag. The protein has a calculated MW of 20.1 kDa. The protein migrates as 20-22 kDa under reducing (R) condition (SDS-PAGE).
标记（Labeling）
Biotinylation of this product is performed using Avitag™ technology. Briefly, the single lysine residue in the Avitag is enzymatically labeled with biotin.
蛋白标记度（Protein Ratio）
Passed as determined by the HABA assay / binding ELISA.
内毒素（Endotoxin）
Less than 1.0 EU per μg by the LAL method.
纯度（Purity）
>90% as determined by SDS-PAGE.
制剂（Formulation）
Lyophilized from 0.22 μm filtered solution in 50 mM Tris,150 mM NaCl,pH7.5 with trehalose as protectant.
Contact us for customized product form or formulation.
重构方法（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.
存储（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.
产品数据图
电泳（SDS-PAGE）
Biotinylated Human FGF basic, Avitag,His Tag on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 90%.
SEC-HPLC
The purity of Biotinylated Human FGF basic, Avitag,His Tag (Cat. No. FGC-H81E3) was greater than 85% as determined by SEC-HPLC.
活性（Bioactivity）-ELISA
Immobilized Human Glypican 3, Fc Tag, low endotoxin (Cat. No. GP3-H5258) at 5 μg/mL (100 μL/well) can bind Biotinylated Human FGF basic, Avitag,His Tag (Cat. No. FGC-H81E3) with a linear range of 0.6-10 ng/mL (QC tested).
Protocol
Immobilized Human FGFR2 (IIIb), His Tag (Cat. No. FGB-H5223) at 5 μg/mL (100 μL/well) can bind Biotinylated Human FGF basic, Avitag,His Tag (Cat. No. FGC-H81E3) with a linear range of 0.01-0.313 μg/mL (Routinely tested).
Protocol
Immobilized Human FGFR2 (IIIc), His Tag (Cat. No. FGC-H5225) at 5 μg/mL (100 μL/well) can bind Biotinylated Human FGF basic, Avitag,His Tag (Cat. No. FGC-H81E3) with a linear range of 5-39 ng/mL (Routinely tested).
Protocol
活性（Bioactivity）-SPR
Biotinylated Human FGF basic, Avitag,His Tag (Cat. No. FGC-H81E3) immobilized on SA Chip can bind Human FGF R1, His Tag (Cat. No. FG1-H5223) with an affinity constant of 96.3 nM as determined in a SPR assay (Biacore 8K) (Routinely tested).
Protocol
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背景
FGF basic is a member of the FGF family of at least 23 related mitogenic proteins which show 35-60% amino acid conservation. FGF acidic and basic, unlike the other members of the family, lack signal peptides and are apparently secreted by mechanisms other than the classical protein secretion pathway. FGF basic has been isolated from a number of sources, including neural tissue, pituitary, adrenal cortex, corpus luteum, and placenta. This factor contains four cysteine residues, but reduced FGF basic retains full biological activity, indicating that disulfide bonds are not required for this activity. bFGF is a critical component of human embryonic stem cell culture medium; the growth factor is necessary for the cells to remain in an undifferentiated state, although the mechanisms by which it does this are poorly defined. It has been demonstrated to induce gremlin expression which in turn is known to inhibit the induction of differentiation by bone morphogenetic proteins. It is necessary in mouse-feeder cell dependent culture systems, as well as in feeder and serum-free culture systems.
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