Human FGF basic, Tag Free (BFF-H4117) is expressed from E.coli cells. It contains AA Pro 143 - Ser 288 (Accession # P09038-4).
Predicted N-terminus: Met
This protein carries no "tag".
The protein has a calculated MW of 16.5 kDa. The protein migrates as 17 kDa under reducing (R) condition (SDS-PAGE).
Less than 1.0 EU per μg by the LAL method.
>95% as determined by SDS-PAGE.
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4. Normally trehalose is added as protectant before lyophilization.
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Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
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.
Human FGF basic, Tag Free 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 FGF basic, Tag Free (Cat. No. BFF-H4117) at 2 μg/mL (100 μL/well) can bind Human Glypican 3, Fc Tag, low endotoxin (Cat. No. GP3-H5258) with a linear range of 4-125 ng/mL (QC tested).
Immobilized Human FGF basic, Tag Free (Cat. No. BFF-H4117) at 1 μg/mL (100 μL/well) can bind Human Glypican 1, Fc Tag (Cat. No. GP1-H5254) with a linear range of 1-39 ng/mL (Routinely tested).
Immobilized Human FGF basic, Tag Free (Cat. No. BFF-H4117) on CM5 Chip can bind Heparin with an affinity constant of 8.37 nM as determined in a SPR assay (Biacore T200) (Routinely tested).
Loaded Biotinylated Heparin on SA Biosensor, can bind Human FGF basic, Tag Free (Cat. No. BFF-H4117) with an affinity constant of 6.27 nM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).
Authors: Wu YT, et al.
Journal: Sci Rep 2015
Application: Cell Culture
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.