Abstract
Enzyme-amplified lanthanide luminescence (EALL) is a new method which has been developed for enzymatically amplified signal detection in ultrasensitive bioanalytical assays where an enzyme is used as label or is itself the analyte of interest. Signal generation is performed by enzymatically transforming a substrate into a product which forms a luminescent lanthanide chelate; the product chelate can then be detected using time-resolved or normal fluorescence methods. Alkaline phosphatase substrates have been developed and demonstrated in a model immunoassay in microwell format. The method has also been demonstrated for detection of a variety of other hydrolytic and oxidative enzymes. Thus the EALL method shows promise for use in a wide variety of bioanalytical applications.
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