At least 23 different variants of IFN-alpha are known. The individual proteins have molecular masses between 19-26 kDa and consist of proteins with lengths of 156-166 and 172 amino acids. All IFN-alpha subtypes possess a common conserved sequence region between amino acid positions 115-151 while the amino-terminal ends are variable. Many IFN-alpha subtypes differ in their sequences at only one or two positions. Naturally occurring variants also include proteins truncated by 10 amino acids at the carboxy-terminal end.
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute in sterile distilled water or aqueous buffer containing 0.1% BSA to a concentration of 0.1-1.0 mg/ml. Stock solutions should be apportioned into working aliquots and stored at <-20?C. Further dilutions should be made in appropriate buffered solutions
保存建議
This lyophilized preparation is stable for several weeks at 2-8?C, but should be kept at -20?C for long term storage, preferably desiccated. Upon reconstitution, the preparation is stable for up to one week at 2-8?C. For maximal stability, apportion the reconstituted preparation into working aliquots and store at -20?C to -70?C. Avoid repeated freeze/thaw cycles.