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• W2896933914 endingPage "13583" @default.
• W2896933914 startingPage "13576" @default.
• W2896933914 abstract "Atrazine is an herbicide that is widely used in crop production at about 70 million pounds per year in the United States. Its widespread use has led to contamination of groundwater and other aquatic systems. It has resulted in many serious environmental and human health issues. This study focuses on the identification and characterization of a single-stranded DNA (ssDNA) aptamer that binds to atrazine. In this study, a variation of the systematic evolution of ligands by exponential enrichment (SELEX) process was used to identify an aptamer, which binds to atrazine with high affinity and specificity. This SELEX focused on inducing the aptamer’s ability to change conformation upon binding to atrazine, and stringent negative target selections. After 12 rounds of in vitro selection, the ssDNA aptamer candidate R12.45 was chosen and truncated to obtain a 46-base sequence. The binding affinity, specificity, and structural characteristics of this truncated candidate was investigated by using isothermal titration calorimetry, circular dichroism (CD) analysis, SYBR Green I (SG) fluorescence displacement assays, and gold nanoparticles (AuNPs) colorimetric assays. The truncated R12.45 candidate aptamer bound to atrazine with high affinity (Kd = 3.7 nM) and displayed low cross-binding activities on structurally related herbicides. In addition, CD analysis data indicated a target induced structural stabilization. Finally, SG assays and AuNPs assays showed nonconventional binding activities between the truncated R12.45 aptamer candidate and atrazine, which warrants future studies." @default.
• W2896933914 created "2018-10-26" @default.
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• W2896933914 date "2018-10-19" @default.
• W2896933914 modified "2023-10-01" @default.
• W2896933914 title "In Vitro Selection and Characterization of a Single-Stranded DNA Aptamer Against the Herbicide Atrazine" @default.
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• W2896933914 doi "https://doi.org/10.1021/acsomega.8b01859" @default.
• W2896933914 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6217647" @default.
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• W2896933914 hasPublicationYear "2018" @default.
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