Most of our Affinity Biologicals polyclonal antibodies are available in several formats, which refer to the level of purification or refinement. The first level format is referred to as "whole IgG" and is an IgG fraction prepared directly from antiserum. The titre is essentially the same as the starting antiserum but in the purified whole IgG format it is a more stable product. Affinity-purified IgG is an enrichment process in which whole IgG is passed over immobilized antigen. Non reactive antibodies are washed away and specific antibodies are then eluted. This is a highly purified product with a substantially higher titre than whole IgG.
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