How stable are cytokines?
Unless otherwise mentioned in the product information sheet, all of our products are formulated in such a manner that the lyophilized proteins are very stable at room temperature (at least for up to 3 weeks). However, for short-term storagethey are best kept at 4 °C. For longer periods, we recommend storing the lyophilized products at -20 °C. We do not recommend storage at temperatures below -50 °C. For reconstituted solutions of most of these products, we recommend short-term storage at 4°C (for only a few days) and using them as soon as possible. For long-term storage, prepare aliquots of the undiluted protein solution (to avoid more than one freeze-thaw cycle) and store them frozen at -20 °C. Please keep in mind that every freeze-thaw cycle may cause some denaturation of the protein. For long-term storage it is sometimes recommended to add a carrier protein (0.1% HSA or BSA).
