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  • Title: The use of biotinylated poly(ADP-ribose) for studies on poly(ADP-ribose)-protein interaction.
    Author: Narendja FM, Sauermann G.
    Journal: Anal Biochem; 1994 Aug 01; 220(2):415-9. PubMed ID: 7978287.
    Abstract:
    Poly(ADP-ribose) is routinely detected by the use of radioactive polymers formed from labeled substrates. In this report a simple and time-saving method for the biotinylation and the detection of poly(ADP-ribose) on blots is described. The polymer modified by light-induced reaction with photobiotin was colorimetrically detected and quantified, using streptavidine-alkaline phosphatase conjugates. The separation of poly(ADP-ribose) chains on polyacrylamide gels was not affected by the biotinylation of the polymers. When biotinylated poly(ADP-ribose) was used to detect the poly(ADP-ribose) binding capability of proteins in ligand blots, the results were comparable to those obtained with poly([32P]ADP-ribose). Experiments with histones and rat liver nuclear proteins demonstrate that in studies on poly(ADP-ribose)-protein interaction, this method is applicable to the detection of poly(ADP-ribose) binding proteins.
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