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Recombinant Human FGF3

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Product Source Size Cat. No. Price
Recombinant Human FGF3 E. coli20 µg Z102285 $120.00
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Data Sheet
Print Version
Alternative Names HBGF-3, FGF3, Proto-oncogene Int-2, Heparin-binding growth factor 3
Description FGF3 belongs to the FGF family, members of which act on cells of mesodermal and neuroectodermal origin. Originally designated int2, the FGF3 gene was initially identified as a protooncogene in mice. FGF3 plays an important role in the regulation of embryonic development, cell proliferation, and cell differentiation and is required for normal ear development. Heparan sulfate glycosaminoglycans function as co-receptors to increase the affinity between FGF3 and its receptors; FGFR1 and FGFR2. Human and mouse FGF3 are known to share 88% amino acid sequence identity. Recombinant Human FGF3 is a single polypeptide of 21 kDa.
Gene Symbol FGF3
Gene ID 2248
Accession No. P11487
Source E. coli
Appearance Lyophilized Powder
Molecular Weight 21.2 kDa
Endotoxin Level <1.0 EU/μg of recombinant protein as determined by the LAL method
Purity >95% as determined by SDS-PAGE
Gel Image Click To Enlarge
Bioactivity The ED50 as determined by the dose-dependent stimulation of mouse fibroblasts was <5ng/ml
Bioactivity Data Click To Enlarge
Formulation Lyophilized from a 0.2 μm filtered solution in PBS, DTT and EDTA
Reconstitution A quick spin of the vial followed by reconstitution in distilled water to a concentration not less than 0.1 mg/mL. This solution can then be diluted into other buffers.
Storage The lyophilized protein is stable for at least one year from date of receipt at -70°C. Upon reconstitution, this cytokine can be stored in working aliquots at 2° - 8°C for one month, or at -20°C for six months, with a carrier protein without detectable loss of activity. Avoid repeated freeze/thaw cycles.
Usage For research use only. Not for diagnostic or therapeutic use.
Product Documents
Product References
FAQs
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How are endotoxin levels measured?
1. For estimating the endotoxin levels; we use the LAL (Limulus Amebocyte Lysate) method: The lysate from horseshoe crab amebocytes clots in the presence of very low endotoxin. This reaction is the basis of the Limulus amebocyte lysate (LAL) assay which was approved by the FDA in 1970.

· Endotoxin is generally measured in Endotoxin Units per milliliter (EU/mL).

· For recombinant proteins: EU is reported per microgram of protein.

· One EU = 0.1-0.2 ng endotoxin/µg of protein.

· At abm, we do the LAL chromogenic assays that can detect down to 0.01 EU/ml.
With regard to the BSA levels in some Growth Factors and Cytokines, can you please provide an explanation as to why they are so high?
The amount of BSA, as part of the formulation of a protein, can vary considerably depending on how much BSA was deemed optimum/necessary for protein stability in combination with /in-lieu of - other possible additives. The aforementioned formulations are somewhat analogous to the “carrier” versions of many formulations from “R and D systems” that have as high as 50 µg of BSA per µg of the recombinant protein product. If, needed or desired, abm scientists can substitute BSA for other stabilizing additives for most formulations.
Are your Escherichia coli sourced growth factors: 1) Human derived materials free? 2) Recombinant proteins free?
Yes, all of abm's growth factors made in Escherichia coli using recombinant technology contain no human derived-products or other recombinant proteins. In the rare cases of BSA presence, this will be mentioned in the product's formulation.