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A nanocomposite was prepared from β-cyclodextrin (β-CD) functionalized graphene oxide and magnetic nanoparticles (GO/Fe3O4/β-CD). In parallel, a polyamidoamine dendrimer conjugated to avidinylated alkaline phosphatase (PAMAM-avidin-ALP) was prepared and exploited as a signal amplification unit in a voltammetric immunoassay for 5-methylcytosine (5mC) in genomic DNA. The GO/Fe3O4/β-CD as a substrate...
DNA methylation is one of the important epigenetics events, and it is responsible for transcription, genomic imprinting and cellular differentiation. Aberrant DNA methylation is always contacted with various diseases. Herein, a simple and low-cost photoelectrochemical (PEC) biosensing method is proposed for detection of DNA methylation, assay of DNA methyltransferase (MTase) activity and screening...
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