Qkine cell therapy grade high purity animal origin-free proteins are manufactured as GMP grade equivalentin an ISO 9001:2015-certified facility, under ISO 20399:2022 standards with GMP compliance and defined quality criteria and documentation.

Raising the standard in bioactive protein manufacturing and innovation

Qkine is committed to manufacturing bioactive proteins of the highest quality to enhance scientific outcomes and improve reproducibility.

Our robust animal-free manufacturing platform, along with rigorous quality control procedures, ensures exceptional bioactivity and consistent performance from lot to lot, guaranteeing outstanding performance in your applications. We proactively leverage our expertise in manufacturing and protein engineering to develop unique optimized proteins designed to address fundamental biological, translational and scalability challenges.

Our product portfolio comprises growth factors and cytokines tailored for stem cell and organoid culture, as well as biomarkers and attachment factors. We actively support emerging fields such as cellular agriculture, regenerative medicine, synthetic hydrogels, organ-on-a-chip technology, and bioprinting.

To ensure absolute reproducibility and optimize scientific outcomes, all our products rigorously adhere to the Nine-point Qkine Quality Commitment.

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Scientific areas

Qkine manufacture a portfolio of high purity, highly bioactive growth factors for pluripotent stem cell maintenance and differentiation. Qkine proteins are optimized for research areas such as neural differentiation, organoid culture, cellular agriculture and hematopoietic and hepatic research.

Growth factors for organoid research

Qkine is committed to manufacturing enhanced-quality bioactive proteins to improve scientific outcomes and reproducibility in organoid culture.

Reproducible cultures with FGF2-G3

Thermostable FGF2-G3 is a hyperstable form of FGF-2 (bFGF), the essential component for the maintenance of pluripotency in stem cell media.

Growth factors for neural stem cells

High-quality growth factors are essential for developing and maintaining robust, reproducible, and physiologically relevant neural cultures.

Products

Qkine proteins are completely animal-origin free and high purity for reproducible cell, stem cell and organoid culture. With bioactivity optimized and guaranteed to be consistent lot-to-lot Qkine growth factors and cytokines are the highest quality, all proteins manufactured in Cambridge, UK

Recombinant human TPO (Qk098)

High purity, highly bioactive thrombopoietin (TPO) to support the self-renewal and maintenance of hematopoietic stem cells.

  • Highly bioactive protein with lower EC50 than alternative supplier proteins
  • High purity monomer, animal origin-free, tag and carrier free
  • Suitable for reproducible hematopoietic cell cultures and the maturation of megakaryocytes into platelets
Recombinant human TPO (Qk098)

Cell therapy grade TGF-β1 PLUS™ protein (Qk010-CTG)

The first commercially available animal origin-free TGF-β1 for cell and gene therapy

  • Extended QC, risk assessment, CoO, CoA documentation
  • Manufactured in an ISO 9001:2015-certified facility
  • ISO 20399:2022 standard and GMP compliant
Cell therapy grade TGF-β1 PLUS™ protein (Qk010-CTG)

Recombinant human IL-34 PLUS™ protein (Qk091)

Cytokine involved in regulating the differentiation, survival, and activation of monocytes, macrophages, and osteoclasts.

  • Qkine optimized sequence to product a highly and consistently bioactive IL-34 protein
  • Suitable to reproducible microglial differentiation from iPSC
  • Highly pure, animal origin-free, tag free and carrier free
Recombinant human IL-34 PLUS™ protein (Qk091)

Latest News

Explore the latest news on what is happening at Qkine and our blogs with updates on recombinant protein technology, stem cell and organoid research and translational applications.

‍Qkine and Interlab announce distribution partnership in Taiwan

‍Qkine and Interlab based in Taipei, Taiwan, partner to distribute Qkine high purity growth factors and cytokines, empowering research in Taiwan.

Refined and benchmarked homemade media for cost-effective, weekend-free human pluripotent stem cell culture

In this recently revised and expanded paper from our collaborators in the Bertero lab, Truszkowski et al. have described a cost-effective homemade media recipe for the culture of human pluripotent stem cells (hPSCs), this adds to the evidence that homemade media using Qkine growth factors can be a suitable replacement for, or improvement on, commercially available media.

Pep Talk October 2025

In our October newsletter we share the exciting news of our cell therapy grade launch. report on the inaugural UK stem cell network meeting and share our newest application notes, events and publications.

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Customer Insights

We have used GDF-15 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 lab has been using FGF-2 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
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