Using 2-aminopurine fluorescence to detect bacteriophage T4 DNA polymerase-DNA complexes that are important for primer extension and proofreading reactions.


The fluorescence of the base analogue 2-aminopurine (2AP) was used to probe bacteriophage T4 DNA polymerase-induced conformational changes in the template strand produced during the nucleotide incorporation and proofreading reactions. 2AP fluorescence in DNA is quenched by 2AP interactions with neighboring bases, but T4 DNA polymerase binding to DNA… (More)


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