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Sera storage should be at -20° C (for up to one year), or 4° C for less than a month. For longer term storage, add 0.05% azide and freeze. Purified antibody is most stable when stored at -80° C and multiple freeze-thaws are avoided. Alternatively, you can add glycerol to a total concentration of 30-50% and store the antibody at -20° C.
