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The Use of 3-Aminophthalimide as a Pro-Chemiluminescent Label in Chemiluminescence and Fluorescence-Based Cellular Assays

Wilden, JD; Mavri-Damelin, D; Mani, A-R; Selden, C; Hodgson, HJF; Damelin, LH; (2009) The Use of 3-Aminophthalimide as a Pro-Chemiluminescent Label in Chemiluminescence and Fluorescence-Based Cellular Assays. Bioconjugate Chemistry , 20 (2) , Article 10.1021/bc800361r. 10.1021/bc800361r.

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Abstract

We present a labeling system for direct chemiluminescence-based cellular bioassays using the stable pro-chemiluminescent, luminol precursor, 3-aminophthalimide (API). API-coupled reporter molecules are detected chemiluminometrically after treatment with hydrazine, which converts the API label to luminol. API derivatives containing a variety of functional groups are readily synthesized, allowing for ease of coupling via the imide nitrogen to a host of reporter molecules. The fluorescent nature of APIs further allows for dual fluorescence and chemiluminescence studies. To highlight the utility of this label, we show that API-labeled insulin can be successfully utilized in cellular binding and transport assays and that an API-coupled mitochondrial probe (API−triphenylphosphonium+) can be used to both fluorescently and chemiluminometrically investigate mitochondrial function. We also assess the use of API as a polysaccharide and nucleic acid label, and we show that API-labeled palmitic acid undergoes cellular transport and lipid metabolism.

Type:Article
Title:The Use of 3-Aminophthalimide as a Pro-Chemiluminescent Label in Chemiluminescence and Fluorescence-Based Cellular Assays
Location:UK
DOI:10.1021/bc800361r
Publisher version:http://pubs.acs.org/doi/full/10.1021/bc800361r
Language:English
Keywords:Chemiluminescence, Luminol, API
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry

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