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As part of our Quality Assurance, all bottled lots are bioassayed prior to their release for sale. This ensures that the bottled protein has full bioactivity and amount. Some cytokines lose bioactivity when lyophilized. For instance, Human Interferon-γ (hIFN-γ) #8901, Human Latent TGF-ß1 #5154, and Mouse FGF basic #5414 are sold in solution.
