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Immunoglobulins are large, Y-shaped proteins produced by B-cells that are used by the immune system to identify and neutralize foreign objects such as bacteria and viruses. The immunoglobulin recognizes a unique part of each antigen. Each tip of the Y shape targets an epitope on the foreign antigen, allowing the two molecules to bind with extreme precision. Using this binding mechanism, an antibody can identify and label a microbe or another infected cell for attack by the immune system, or in some cases neutralize the target itself by binding to and blocking one or more of its processes. The production of immunoglobulins is the main function of the humoral immune system, there are five distinct classes based on structural and antigenic properties: IgA, IgD, IgE, IgG, and IgM. If you are looking for highly pure, high quality immunoglobulins and their associated isotypes for use in medical or industrial diagnostics and research, serology, ELISA, western blotting, Immunofluorescence and other immunoassays then Fitzgerald Industries offers a huge range of immunoglobulins for sale from a full selection of avian and mammalian host species. As well as purified titres of the five main immunoglobulin classes, Fitzgerald provides the whole range of alpha, beta and gamma Ig isotypes, fluorescein isothiocyanate (FITC), horseradish peroxidase (HRP) and biotin conjugated immunoglobulins, Fc specific, Fab and Fab2 fragments and heavy, light, gamma and lambda chains from multiple host species are also available. Our immunoglobulins are available to buy in bulk quantities or smaller titres on request with a wide variety of hosts, targets and conjugates to suit your needs. Our range of immunoglobulins and antibodies continuously updated with new targets so please do not hesitate to contact us with your specific requirements.