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Xeno-Free and Endotoxin-Free Human Cytokines
Product News

Xeno-Free and Endotoxin-Free Human Cytokines

Xeno-Free and Endotoxin-Free Human Cytokines
Product News

Xeno-Free and Endotoxin-Free Human Cytokines


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AMSBIO has launched a complete new range of commonly used human cytokines and growth factors. Unlike most of other commercially available cytokine products, ActiveMax® cytokines are expressed exclusively in human cells under strict animal-free and xeno-free conditions. Therefore, they are uniquely suitable for human cell culture and assay development.

Endotoxin and other non-human components can provoke immune response in human systems. These contaminations are significant complicating factors for human cell culture experiments, in particular those relevant to human cell therapy or other clinical applications.

AMSBIO ActiveMax® cytokines are exclusively produced in a serum-free, animal component-free and chemically defined cell culture system. These cytokines are absolutely xeno-free, and have an endotoxin level of less than 1.0 EU per microgram.

Human recombinant proteins expressed from bacteria, insect, or non-human mammalian cells often fall short in fully recapitulating the post-translational modifications of their native counterparts, largely due to lack of human-specific mechanisms in the hosts. Consequently, these proteins often demonstrate compromised biological properties.

By contrast the bulk production of ActiveMax® cytokines relies entirely on the human cellular machinery provided by the HEK293 cells. As a result, AMSBIO cytokines retain their authentic post-translational processing, which translates into high bioactivity and stability.

In addition, our HEKMax® production technology platform confers a very high level of target expression, which allows us to purify proteins without the use of artificially introduced tags. This true tag-free production brings the benefit of fully maintaining the proteins’ native conformation and biological properties, including ligand-receptor binding affinity, which may be affected by subtle charge/size changes caused by the addition of tags.

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