Growth Factors made for Stem Cells


We control every step of protein manufacture ensuring all our products are completely animal-free

Total transparency

Stringent purity and bioactivity testing data for all proteins – know what you are giving your cells

Protein innovation

Our R&D team are dedicated to solving stem cell culture challenges with optimised forms and animal-free firsts

Bioactivity graph showing the EC50 of 110 ng/ml (5.2 nM) for Qkine recombinant human FGF-8b

FGF-8a and FGF-8b now available 

We have launched FGF-8a and FGF-8b as part of our neural stem cell range. Manufactured in our Cambridge facility, these recombinant proteins are animal-free and highly bioactive.

FGF8a and b play a key role in the regulation of embryogenesis, cellular proliferation, differentiation, and migration. Order now.

Alison and Catherine Top21 Awards

Qkine is a #21toWatch Top21.2023 winner!

We are excited to have been recognised in this year’s Cofinitive #21toWatch awards.

This award recognises the People, Companies, and ‘Things’ that are setting the standards in innovation and entrepreneurship across the Cambridge, UK ecosystem.

Have you heard about our new referral program?

We are offering our customers and their colleague/friends the chance to both receive a £25 Amazon Gift card when they are referred to Qkine.

To take part in our program and to find out all the terms and conditions, visit our referral program page below.


In this week’s #FridayRead, Mohamed et al. present the method to generate larger numbers of human Midbrain Organoids (hMOs), in a manner that decreases variability whilst maintaining the viability of these hMOs over time – addressing the reproducibility challenge of the stem cell field.


Always reconstitute TGF beta family proteins using a low pH (We use 10mM HCl) – these proteins will precipitate in a physiological buffer. The low pH will also aid the maintenance of the correct disulfide structure by minimizing disulfide bond exchange reactions. Learn more about handling and storing proteins with Qkine.

Qkine Tech Support Team

Trusted by experts

“Our lab has been using FGF2 and activin A from Qkine in stem cell cultures for many months now. Our epiblast stem cells and trophoblast stem cells never looked better. Qkine has provided us with exceptional customer service and most importantly top-quality, affordable growth factors. We will be definitely using their products in the future.”
Prof Jan Zylicz, Novo Nordisk Foundation, University of Copenhagen

Recombinant human activin A PLUS, Qk005, and recombinant zebrafish Fgf2, Qk002,  feature in the recent publication:
Kinoshita, M. et al. Capture of Mouse and Human Stem Cells with Features of Formative Pluripotency. Cell Stem Cell (2020) doi:10.1016/j.stem.2020.11.005.

Austin Smith Lab, Cambridge Stem Cell Institute / University of Exeter
“We have used GDF15 from Qkine in cellular experiments and in vivo and it performs very well. Qkine staff are communicative and efficient and delivery times are excellent.”
Prof Stephen O’Rahilly, University of Cambridge, UK

Our scientists are here to help.

Please contact us with questions, product suggestions and ideas.
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