Photoproteins as luminescent labels in binding assays

Jennifer C. Lewis, Sylvia Daunert

Research output: Contribution to journalReview articlepeer-review

29 Scopus citations


Certain marine organisms produce calcium-activated photoproteins that allow them to emit light for a variety of purposes, such as defense, feeding, breeding, etc. Even though there are many bioluminescent organisms in nature, only a few photoproteins have been isolated and characterized. The mechanism of emission of light in the blue region is the result of an internal chemical reaction. Because there is no need for excitation through external irradiation for the emission of bioluminescence, the signal produced has virtually no background. This allows for the detection of the proteins at extremely low levels, making these photoproteins attractive labels for analytical applications. In that regard, the use of certain photoproteins, namely, aequorin, obelin, and the green fluorescent protein as labels in the design and development of binding assays for biomolecules has been reviewed. In addition, a related fluorescent photoprotein, the green fluorescent protein (GFP), has been recently employed in bioanalysis. The use of GFP in binding assays is also discussed in this review.

Original languageEnglish (US)
Pages (from-to)760-768
Number of pages9
JournalFresenius' Journal of Analytical Chemistry
Issue number6-7
StatePublished - Jan 1 2000
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry


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