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https://www.selleckchem.com/products/3-typ.html A label-free electrochemical method was developed for sensitive determination of ten-eleven translocation protein 1 (TET1) which can mediate the demethylation of DNA. This strategy is mainly based on MspI-mediated restriction endonuclease reaction. Current response difference of the biosensor before and after cleavage by MspI was dependent on the activity and concentration of TET1. With the aid of Au nanoparticles, this method shows a good linear range from 0.0042 μg μL-1 to 0.0210 μg μL -1 with a correlation coefficient of 0.9350 and a low limit of detection 0.00098 μg μL -1. Finally, this method was used to investigate the effects of n-oxalylglycine (NOG) and taxol on activity of TET1. The results indicated that NOG could inhibit TET1 activity but taxol could not. So this electrochemical biosensor could be applied to TET activity evaluation and inhibitor screening in field of biomedicine and clinical diagnosis.Colorectal cancer (CRC) develops from polyps in the inner large intestine or rectum and an increasing incidence and high mortality rate has been observed in humans. Currently, colonoscopy is the preferred modality for early CRC diagnosis. However, this technique has several limitations, such as high medical costs and intricate procedures, leading to increasing demands for the development of a new, simple, and affordable diagnostic method. In this study, an advanced electrochemical biosensor based on rationally designed affinity peptides was developed for discriminating adenoma to carcinoma progression. Amino acid-substituted and rationally designed synthetic peptides (BP3-1 to BP3-8) based on in silico modeling studies were chemically synthesized, and covalently immobilized onto a gold electrode using aromatic ring compounds through surface chemistry techniques. The binding performance of the developed sensor system was observed using square wave voltammetry (SWV). The peptide BP3-2 was selected depending on it

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