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Competitive ELISA, Immobilized antigen - Immunoassays

Competitive ELISA is an immunoassay format used for the determination of low-molecular-weight targets. The format where the antigen is immobilized on the microtiter plate surface is versatile and easy to develop. The main advantage is that it uses a detection antibody labeled by standard techniques and omit the need for the synthesis of labeled antigen, the tracer.