Cost-effective growth factors for stem cell research


Qkine manufactures high-purity, animal-free growth factors, cytokines and other complex proteins for stem cell and organoid culture. An ISO 9001: 2015 certified company based in Cambridge, UK, Qkine combines proprietary production processes with protein engineering technology to tackle fundamental biological and scale-up challenges.


    • High lot-to-lot consistency to help increase the reproducibility of experiments
    • Animal-free to eliminate the risks of contaminating growth factors, viruses, and prions
    • Ultra-pure confirmed by several varied techniques, ensuring the reliability of results
    • Clear QC data provided on every lot from our ISO 9001:2015 accredited facility
    • Highly bioactive and potentially more bioactive than alternative suppliers
    • Long storage at -80 degree celcius for up to 2 years for most proteins
    • Multiple pack sizes to suit your research


Featured product from Qkine


FGF2-G3 (FGF2-STAB®) protein is a thermostable engineered form of FGF-2 (bFGF). Qk053 is the 154 aa mature domain of FGF-2 (Qk027) with nine amino acid substitutions to enhance stability without impacting bioactivity developed by Dvorak et al. 2018. This increases the functional half-life of the protein from <10 h (wild-type) to >7 days (FGF2-G3).


FGF2-G3 is used in B8 media (Kuo et al. 2019) for weekend free, high homogeneity induced pluripotent stem cell culture. FGF2-G3 also has applications in chemically defined stem cell and organoid culture media, and cultured meat media development.


  • High purity 17 kDa bioactive FGF2-G3 protein
  • Animal-free (AOF) and carrier-protein free (CF)
  • With no His-tag


[WEB] Product specification: FGF2-G3 Protein 154 aa (Qk053)

[Flyer] FGF2-G3 unprecedented stability, uncompromised action

[WEB] Featured products from Qkine

[WEB] Product specification: recombinant FGF2-G3 145 aa protein (Qk052)

[WEB] Product specification: recombinant human FGF-2 (bFGF) 154 aa protein (Qk027)

[WEB] Product specification: recombinant human FGF-2 (bFGF) 145 aa protein (Qk025)

Drop us a line today to learn more about our comprehensive recombinant protein selection.


  1. Qkine, ‘recombinant FGF2-G3 protein (Qk053)’, Available at
  2. Qkine, ‘recombinant FGF2-G3 145 aa protein (Qk052)’, Available at
  3. Qkine, ‘recombinant human FGF-2 (bFGF) 154 aa protein (Qk027), Available at
  4. Qkine, ‘recombinant human FGF-2 (bFGF) 145 aa protein (Qk025)’, Available at

All products listed on this site and sold through LAB-A-PORTER Limited are for research use only (RUO). Not for human use. Not for therapeutic or diagnostic use. 

Contact us to explore our recombinant protein offerings.

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