Recombinant human FGF-2 (154 aa) protein (Qk027) Price range: £150.00 through £735.00View product
Recombinant human FGF-2 (154 aa) protein (Qk027)
Price range: £150.00 through £735.00
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).
This protein is also available as GMP compliant Cell Therapy Grade, to enquire email support@qkine.com.
In stock
Orders are typically shipped same or next day (except Friday).
Easy world-wide ordering, direct or through our distributors.
Price range: £150.00 through £735.00
1000 µg will be dispatched as 2 x 500 µg.
Buy online with secure credit card or purchase order. For any questions, please email orders@qkine.com
Summary:
- High purity human FGF-2 protein comprising longer structured 154 aa region, residues 135-288 (Uniprot: P09038)
- 17 kDa
>98%, by SDS-PAGE quantitative densitometry
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 sterile-filtered water at >50 µg/ml, add carrier protein if desired, prepare single use aliquots and store frozen at -20 °C (short-term) or -80 °C (long-term).
Featured applications:
Induced pluripotent and embryonic stem cell differentiation and maintenance
Alternative proteins
- Recombinant human FGF-2 (145 aa) protein (Qk025)
- Recombinant FGF2-G3 (154 aa) protein (Qk053)
- StemBeads® Qkine FGF-2 154 aa
- Thermostable FGF-2 discovery kit (Qk502)
- Serum-free media optimization growth factor discovery kit (Qk505)
- StemBeads® Qkine FGF-2 154 aa DISC™ device (mini)
- StemBeads® Qkine FGF-2 154 aa DISC™ device
FGF-2 154 aa activity was determined using the Promega serum response element luciferase reporter assay (*) in transfected HEK293T cells. Cells were treated in triplicate with a serial dilution of FGF-2 for 6 hours. Firefly luciferase activity was measured and normalized to the control Renilla luciferase activity. Data from Qk027 lot #204659. EC50 = 0.28 ng/ml (17 pM).
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
Recovery from stock vial: >95%
Endotoxin: <0.05 EU/μg protein
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.
Additional resources
- Technote | FGF2-G3 (Qk053) stability vs wild type
- Technote | FGF2-G3 (Qk052) stability 7 days in media
- Technote | Tuna FGF-2 154 aa (Qk105) vs human FGF-2 154 aa (Qk027) bioactivity
- Differentiation of induced pluripotent stem cells (iPSCs) into neuroectoderm (PDF)
- Differentiation of induced pluripotent stem cells (iPSCs) into mesoderm (PDF)
- Poster: Neural and glial cell maintenance and differentiation
- Poster: Pluripotent stem-cell derived organoids
- Poster: Adult stem-cell derived organoids
- Brochure: Growth factors for neural and glial cell differentiation
- Brochure: Growth factors for enhanced organoid culture protocols
Publications using Recombinant human FGF-2 (154 aa) protein (Qk027)
Generation of functional hepatocytes by forward programming with nuclear receptors
Tomaz RA, Zacharis ED, Bachinger F et al.
DOI: doi: 10.7554/eLife.71591Progesterone Receptor Modulates Extraembryonic Mesoderm and Cardiac progenitor Specification during Mouse Gastrulation
Drozd AM, Mariani L, Guo X, Goitea V, Menezes NA and Ferretti E.
DOI: doi: 10.3390/ijms231810307Refined and benchmarked homemade media for cost-effective, weekend-free human pluripotent stem cell culture
Truszkowski L, Bottini S, Bianchi S et al.
DOI: doi.org/10.12688/openreseurope.18245.2Stem cell-derived porcine macrophages as a new platform for studying host-pathogen interactions
Meek S, Watson T, Eory L et al.
DOI: doi: 10.1186/s12915-021-01217-8Synchronous 3D patterning of diverse CNS progenitors generates motor neurons of broad axial identity
Buchner F, Dokuzluoglu Z, Thomas J et al.
DOI: https://doi.org/10.1101/2024.12.13.628384The effects of culture conditions on cell metabolism and function
Tan, J. (Thesis)
DOI: ThesisA conserved differentiation program facilitates inhibitory neuron production in the developing mouse and human cerebellum
Christensen JB, Donovan APA, Marzieh Moradi M et al.
DOI: doi: 10.1242/dev.204811LRRC58 defines an E3 ubiquitin ligase complex sensitive to cysteine abundance
Ramage DE, Wieske LHE, Crowe C at al.
DOI: doi.org/10.1101/2025.09.23.678073Suidae iPSC-derived macrophages as models for investigating susceptibility and resilience to African swine fever virus
Watson TM, Goatley LC, Meek S et al.
DOI: doi.org/10.64898/2026.04.22.719209
FAQ
What is FGF-2?
Fibroblast growth factor 2 (FGF-2), also known as basic fibroblast growth factor (bFGF) is a growth factor and signaling protein.
Where is FGF-2 found?
FGF-2 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.
What does FGF-2 do?
FGF-2 is essential for normal embryonic development. It has roles in cell survival and proliferation, angiogenesis, tumorigenesis, wound healing and tissue repair.
What does FGF-2 bind to?
FGF-2 binds to and signals though all four of the FGF receptors FGFR1-4.
What is the function of the FGF receptor?
FGFRs phosphorylate specific tyrosine residues and activate the RAS-MAPK, PI3K-AKT, PLCγ, and STAT intracellular signaling pathways.
How is FGF-2 used in stem cell culture?
FGF-2 is used to maintain the pluripotency of stem cells in culture.
What is the difference between FGF-2 145 aa and 154 aa?
Fibroblast Growth Factor 2 (FGF-2) exists in two main isoforms, distinguished by length: 145 amino acids (aa) and 154 aa. The 154 aa variant contains an additional nine amino acids at the N-terminus. While this extension is not essential for biological activity, it may influence the protein’s localization within cells.
Key differences between the isoforms:
- FGF-2 (145 aa):
- The most widely used form, supporting proliferation and survival of stem and progenitor cells.
- Commonly preferred for organoid culture due to its robust activity and well-established performance.
- FGF-2 (154 aa):
- Contains an N-terminal extension that may affect intracellular localization or signaling.
- Typically, not required for standard organoid or stem cell maintenance, unless specific signaling or localization effects are being investigated.
What is FGF2-G3 (FGF2-STAB®)?
Recombinant FGF2-G3 (FGF2-STAB®) is a thermostable, engineered form of FGF-2 (bFGF). This modification significantly increases the protein’s functional half-life — from <10 hours for wild-type FGF-2 to >7 days for FGF2-G3 — improving stability and consistency in culture systems.
Our products are for research use only and not for diagnostic or therapeutic use. Products are not for resale.
For use in manufacturing of cellular or gene therapy products. Not intended for in vivo applications.
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