Currency
Recombinant human FGF-2 (bFGF) 154 aa protein (Qk027)
Recombinant human fibroblast growth factor 2 (FGF-2) protein (154 aa) is a highly bioactive, long–form of FGF-2/bFGF protein. FGF-2 protein is used to support the maintenance of human embryonic stem cells and proliferation and differentiation of induced pluripotent and mesenchymal stem cells. This 154 aa form of FGF-2 comprises the core structured region and N-terminal extension.
Highly pure and bioactive 17 kDa FGF-2 / bFGF protein, animal origin-free (AOF) and carrier protein-free (CF).
Orders are typically shipped same or next day (except Friday).
Easy world-wide ordering, direct or through our distributors.
1000µg will be despatched as 2 x 500µg
Fast and free shipping.
Buy online with secure credit card or purchase order.
For any questions, please email orders@qkine.com
Summary
High purity human FGF-2 / bFGF protein comprising longer structured 154 aa region, residues 135-288 (Uniprot: P09038)
>98%, by SDS-PAGE quantitative densitometry
17 kDa
Expressed in E. coli
Animal origin-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°C (short-term) or -80°C (long-term)
Featured Applications
iPSC / ESC expansion and differentiation
human
species similarity:
bovine – 99%
porcine – 99%
rat – 97%
mouse – 94%
Frequently used together
Related discovery kit
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 customerservice@qkine.com for further information or to request the previous datasheet.
Bioactivity
FGF-2 154 aa 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 FGF-2 for 6 hours. Firefly luciferase activity is measured and normalized to the control Renilla luciferase activity. EC50 = 11.3 pM (0.19 ng/mL). Data from Qk027 lot #12. *Promega pGL4.33[luc2P/SRE/Hygro] #E1340
Purity
FGF-2 migrates as major band at 17 kDa in non-reducing conditions and upon reduction. 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 Qk027 lot #010
Further quality assays
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.
Protein background
Fibroblast growth factors (FGFs) are a family of growth factors which regulate a wide range of essential biological functions including cell proliferation and survival, migration and differentiation [1]. The human FGF family has 18-22 members grouped into 6-7 subfamilies based on sequence homology and phylogeny [2]. The FGF family of growth factors have critical roles during both vertebrate and invertebrate embryonic development, in adult cells they modulate tissue maintenance, wound healing and angiogenesis [1,2].
The FGF ligands bind to 4 receptors (FGFR1-4), transmembrane receptors with intracellular tyrosine kinase activity [2, 3]. Once activated FGFRs recruit Src homology-2 (SH2) or phosphotyrosine binding (PTB) domain-containing signaling proteins leading to activation of intracellular signaling pathways [1]. The main signaling pathways activated by FGF binding are the RAS/MAP kinase pathway, PI3 kinase/Akt pathway, and PLCγ pathways [1-3].
Fibroblast growth factor 2 (FGF-2) also known as basic fibroblast growth factor (bFGF) has a broad range of physiological roles including regulation of cell growth, survival and proliferation. FGF-2 is one of the FGFs which binds to and signals through all four of the FGFRs [4].
FGF-2 is an essential growth factor for the maintenance of pluripotency in human embryonic stem cells (ESCs), induced pluripotent stem cells (iPSCs) [4] and mesenchymal stem cells (MSCs) [5]. FGF-2 preserves pluripotency through interaction with PI3 kinase/Akt, ERK1/2, JAK/STAT and PLCγ pathways by activation of Activin A. In feeder culture systems FGF-2 stimulates production of essential growth factors and cytokines from the feeder layer [5].
FGF-2 and TGF-β1 are required for maintenance of iPSC in feeder free culture, Qkine produces high quality, bioactive and animal origin-free FGF-2 (Qk027) and TGF-β1 (Qk010) for stem cell culture. However, FGF-2 has poor thermostability in culture so, to prevent the need for daily media changes, Qkine FGF2-G3 has been engineered to be highly thermostable allowing weekend-free culture of iPSCs.
Publications using recombinant human FGF-2 (bFGF) 154 aa protein (Qk027)
Progesterone Receptor Modulates Extraembryonic Mesoderm and Cardiac Progenitor Specification during Mouse Gastrulation
In International Journal Molecular Sciences on 7 September 2022 by Drozd, A. et al.
Stem Cell-Derived Porcine Macrophages as a New Platform for Studying Host-Pathogen Interactions
In BMC Biology 2022 Meek, S. et al.
Generation of functional hepatocytes by forward programming with nuclear receptors
In eLife on 12 August 2022 by Tomaz, R. et al.
Refined home-brew media for cost-effective, weekend-free hiPSC culture and genetic engineering.
In Open Research Europe 2024 by Truszkowski, L., Bottini, S., Bianchi, S. et al.
FAQ
Fibroblast growth factor 2 (FGF-2), also known as basic fibroblast growth factor (bFGF) is a growth factor and signaling protein.
FGF2 is expressed in a developmental and tissue specific manner. It’s expression is tightly controlled in normal tissues and it can be detected in all major tissues.
FGF2 is essential for normal embryonic development. It has roles in cell survival and proliferation, angiogenesis, tumorigenesis, wound healing and tissue repair.
FGF2 binds to and signals though all four of the FGF receptors FGFR1-4.
FGFRs phosphorylate specific tyrosine residues and activate the RAS-MAPK, PI3K-AKT, PLCγ, and STAT intracellular signaling pathways.
FGF2 is used to maintain the pluripotency of stem cells in culture.
Our products are for research use only and not for diagnostic or therapeutic use. Products are not for resale.
What others are saying
There are no contributions yet.