Zebrafish FGF-2 protein (bFGF/basic FGF) has been used extensively to support the maintenance and proliferation of human and mouse induced pluripotent (iPSC) and embryonic stem cells (ESC); used in the original Ludwig et al feeder-free culture of embryonic stem cells protocols 1-3.
High purity 17 kDa FGF2 / bFGF protein, animal-derived component free (ACDF) and carrier-protein free (CF). This version of recombinant zebrafish FGF2 is used by the core facility at the Cambridge Stem Cell Institute, UK and historically by many of the stem cell groups based at University of Cambridge.
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High purity zebrafish Danio rerio FGF2/bFGF (residues 2-154, Uniprot: B3DGE3) as described in Ludwig et al.2.
>98%, by SDS-PAGE quantitative densitometry
Expressed in E. coli
Animal-free (AOF) and carrier protein-free.
Manufactured in our Cambridge, UK laboratories
Lyophilized from Tris/NaCl/CyS/mannitol
Resuspend in water at >100 µg/ml, prepare single use aliquots, add carrier protein if desired, store frozen at -20 oC (short-term) or -80 oC (long-term)
Stem cell expansion and maintenance; recombinant zebrafish FGF2 is used by the core facility at the Cambridge Stem Cell Institute, UK and historically by many of the stem cell groups based at University of Cambridge
1. Ludwig, T. E. et al. Derivation of human embryonic stem cells in defined conditions. Nat. Biotechnol. 24, 185–187 (2006).
2. Ludwig, T. E. et al. Feeder-independent culture of human embryonic stem cells. Nat. Methods 3, 637–646 (2006).
3. Chen, G., Gulbranson, D. R., Yu, P., Hou, Z. & Thomson, J. A. Thermal stability of fibroblast growth factor protein is a determinant factor in regulating self-renewal, differentiation, and reprogramming in human pluripotent stem cells. Stem Cells 30, 623–30 (2012).
Recombinant human FGF2 145aa protein
Recombinant human FGF2 154aa protein
Recombinant mouse FGF2 protein
Recombinant bovine/procine FGF2 protein
This protein has recently been reformulated and will now arrive lyophilized. This change has been made to provide enhanced stability to ensure that we offer the best customer experience in terms of shipping and storage and to align with our company sustainability goals. Please visit our reconstitution page or contact firstname.lastname@example.org for further information or to request the previous datasheet.
Zebrafish FGF2 activity is determined using the Promega serum response element luciferase reporter assay (*) in transfected HEK293T cells.
Cells are treated in triplicate with a serial dilution of FGF2 for 6 hours. Firefly luciferase activity is measured and normalized to the control Renilla luciferase activity. EC50 = 0.42 ng/ml (24.7 pM). Data are from Qk002 batch #011
*Promega pGL4.33[luc2P/SRE/Hygro] #E1340
FGF2 migrates as major band at 17 kDa in non-reducing (-βME) conditions and upon reduction (+βME). The higher molecular mass band at 35 kDa is a dimer that we always see in our highly purified zebrafish FGF2 protein, the presence of this does not affect biological activity. Purified recombinant protein (7 µg) was resolved using 15% w/v SDS-PAGE in reduced (+β-mercaptothanol, R) and non-reduced conditions (NR) and stained with Coomassie Brilliant Blue R250.
Data from Qk002 lot #011
Mass spectrometry: single species with expected mass
Endotoxin: <0.005 EU/μg protein (below level of detection)
Recovery from stock vial: >95%
We are a company founded and run by scientists to provide a service and support innovation in stem cell biology and regenerative medicine. All our products are exceptionally high purity, with complete characterisation and bioactivity analysis on every lot.
Fibroblast growth factor 2 (FGF2) – also known as basic fibroblast growth factor (bFGF) – has a broad range of physiological roles including regulation of cell proliferation and differentiation. FGF2 is used to support the maintenance of human embryonic stem cells and proliferation and differentiation of induced pluripotent and mesenchymal stem cells.
Our products are for research use only and not for diagnostic or therapeutic use. Products are not for resale.
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Stem cell researcher, University of Oxford, UK
– July 20, 2018
We have also used the FGF2 for pancreatic cancer sphere systems and it seems to support the growth of the cells as we would expect. University of Oxford, UK.
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