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• W2894616442 startingPage "13057" @default.
• W2894616442 abstract "Surface plasmon resonance (SPR) is a powerful technique to study the interactions of ligands with analytes and therefore a number of biosensor surfaces and injection methods have been developed so far. However, many experimental parameters can affect the interactions and consequently the affinity measurements. In particular, the interactions of positively charged analytes (often used for anionic nucleic acids targets) can be influenced by the sensing surfaces (e.g., negatively charged), leading to significant nonspecific interactions as well as regeneration problems. The aim of the present work is to investigate the effect of different parameters, including ionic strength, SPR biosensor (i.e., nature of the surfaces), and the injection method on the recognition of porphyrin G-quadruplex ligands. We demonstrate that the injection method does not influence the affinity whereas the ionic strength and the nature of the surface impact the recognition properties of the porphyrin for the G-quadruplex DNA. We also found that self-assembled monolayer coating surface presents many advantages in comparison with carboxymethylated dextran surface for SPR studies of G-quadruplex DNA/ligand interactions: (i) the electrostatic interaction with charged analytes is less important, (ii) its structure/composition is less sensitive to the ionic concentration and less prone to unspecific adsorption, (iii) it is easily homemade, and (iv) the cost is approximately 10 times cheaper." @default.
• W2894616442 created "2018-10-12" @default.
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• W2894616442 date "2018-10-07" @default.
• W2894616442 modified "2023-10-09" @default.
• W2894616442 title "Influence of the SPR Experimental Conditions on the G-Quadruplex DNA Recognition by Porphyrin Derivatives" @default.
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• W2894616442 doi "https://doi.org/10.1021/acs.langmuir.8b02942" @default.
• W2894616442 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30293430" @default.
• W2894616442 hasPublicationYear "2018" @default.
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