Abstract
A quantitative immunoassay has been developed for the determination of the total IgG subclass levels in human serum. The method is based on an enzyme immunoassay in which IgG subclass proteins IgGx in an unknown serum sample compete with a known quantity of peroxidase (PO)-labelled IgGx in fluid phase for subclass-specific monoclonal antibodies coated to the solid phase of microtiter wells. Using a series of human blood samples an excellent correlation was observed with the IgG-subclass levels determined by single radial immunodiffusion.
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