Store at 4°C short term. Aliquot and store at -20°C long term. Avoid freeze-thaw cycles.
If you buy Antibodies supplied by Bioworld they should be stored frozen at - 24°C for long term storage and for short term at + 5°C.
The antibody was affinity-purified from rabbit antiserum by affinity-chromatography using epitope-specific immunogen and the purity is > 95% (by SDS-PAGE).
Polyclonals can be used for Western blot, immunohistochemistry on frozen slices or parrafin fixed tissues. The advantage is that there are more epitopes available in a polyclonal antiserum to detect the proteins than in monoclonal sera.