Bioactivity. Guaranteed.
Qkine is committed to manufacturing enhanced-quality bioactive proteins to improve scientific outcomes and reproducibility. We guarantee the bioactivity of all our proteins to be equally or more bioactive than those from other dominant suppliers to ensure that your results are reliable and reproducible every time.
Providing the highest-quality growth factors and cytokines
To support stem cell scientists, Qkine manufactures scalable, animal-free recombinant proteins with exceptional lot-to-lot consistency and bioactivity guaranteed.
We guarantee the bioactivity of all our proteins to be as bioactive or more bioactive than other major suppliers to ensure that your results are reliable and reproducible every time. We have stringent quality control procedures in place to provide you with highly pure proteins with exceptional bioactivity, providing you with outstanding performance in your cultures. We couple this with unrivaled lot-to-lot consistency, ensuring every single batch meets the same quality standards as all previous ones, thereby reducing the need for batch testing.
We never compromise on the purity and bioactivity of our proteins. To ensure full reproducibility and enhance scientific outcomes, all our products adhere to the Nine-point Qkine Quality Commitment.
Our promise - Purchase with confidence with our Bioactivity Guarantee
We are confident that the quality and bioactivity of our recombinant proteins will ensure that you achieve your research goals. However, if for any reason you experience an issue with your Qkine recombinant protein, please contact us immediately, and we will refund or replace your protein.
Our expert team of stem cell scientists and protein biochemists will then work with you to ensure you achieve your desired results.
High biological activity
At Qkine, we test and validate the bioactivity of all our growth factors against other suppliers’ proteins to ensure that we provide you with the highest level of biological activity.
Excellent lot-to-lot consistency
All Qkine growth factors and cytokines have exceptional lot-to-lot consistency. Every batch is checked during a stringent QC process to ensure it has the same bioactivity as prior batches and to ensure reproducibility.
High quality
Current industry standards require endotoxin levels in growth factor lots to be less than 0.5 EU/mL. However, the lower, the better, and Qkine imposes internal standards of <0.1 EU per µg protein.
Long-term stability
All Qkine proteins come lyophilized and the bioactivity is guaranteed for 2 years in lyophilized form. Once reconstituted, the biological activity remains stable for 12 months in single-use aliquots reducing waste and increasing reproducibility in your process.
Animal-free
All our recombinant proteins are animal-free because an animal-free manufacturing process guarantees reproducible proteins that are pure, bioactive, and free from endogenous contaminants.
High purity
We guarantee >98% purity due to limitations of the assays, but we are confident that the true result is higher. To ensure purity, we always run an overloaded gel with 7ug of protein to ensure that we can not visually detect any contaminants, aggregates, or degradants.