Store unopened antibody at 4 degree C or lower. Under these conditions, there is no significant loss in product performance one year from the purchase date. The reconstituted antibody is stable for at least two months when stored at 4 degree C. For long term storage, it is recommended that aliquots of the antibody are frozen at -20 degree C (frost-free freezers are not recommended). Repeated freezing and thawing must be avoided. Prepare working dilutions on the day of use.