Creative BioMart provides quality recombinant proteins, diagnostic antibodies and antigens, diagnostic enzymes and pharmaceutical enzymes to the research community of biology, clinical research, molecular diagnostics and biopharmaceutical drug development.Lyophilized Interleukin-4 although stable at room temperature for 3 weeks, should be stored desiccated below -18℃. Upon reconstitution IL4 should be stored at 4℃ between 2-7 days and for future use below -18℃. For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA). Please prevent freeze-thaw cycles.http://www.creativebiomart.net/description_20617_14.htm