Greater than 90% (determined by SDS-PAGE)
This protein can be stored at -20 degrees Celsius. For extended periods of time it is recommended to keep the protein frozen at -40 or -80 degrees Celsius. Avoid cycles of freezing and thawing as they might denaturate the polypeptide chains.
This protein can be used as a positive control for applications such as ELISA, IFA, RIA, Western Blot, etc.