Stored at -20C on dry atmosphere in lyophilized form.After reconstitution with distilled water to a concentration not less than 0.1 mg/mL, this product can be stored in working aliquots at 2-8C for one month, or at -20C for six months, with a carrier protein without detectable loss of activity. This solution can then be diluted into other buffers.Aliquot to avoid repeated freezing and thawing.