Cloned enzyme donor immunoassay

Competitive homogenous enzyme immunoassay

A cloned enzyme donor immunoassay (CEDIA) is a competitive homogenous enzyme immunoassay. This assay makes use of two component fragments of an enzyme which are each individually inactive. Under the right conditions in solution these fragments can spontaneously reassemble to form the active enzyme. For use in biochemical assays, one of the enzyme fragments is attached to an analyte of interest. The analyte-enzyme-fragment-conjugate is still able to reassemble with the other enzyme fragment to form an active enzyme. However it is unable to do this if the analyte is bound to an antibody.

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