Spectrochim Acta A Mol Biomol Spectrosc 2021 Apr 21;258:119866. Epub 2021 Apr 21.
Institute of Biological Research, Branch of National Institute of Research and Development for Biological Sciences, Republicii 48, 400015 Cluj-Napoca, Romania.
In this work structural and (sub)picosecond surface dynamical changes of genomic DNA isolated from different medicinal plants (Hyssopus officinalis, Majorana hortensis, Melissa officinalis, Mentha piperita, Mentha piperita cv "Cristal", Monarda didyma and Matricaria chamomilla), as probed with surface-enhanced Raman spectroscopy (SERS), are discussed upon modifying the acidic pH of mixtures consisting of silver colloidal suspension and DNA samples, respectively. Binding affinity changes of DNA with silver NPs and nucleic acids protonation are supposed to take place upon lowering the pH. A small percentage of Hoogsteen GC basepairs was found in Mentha piperita cv "Cristal" DNA, at low acidic pH. Read More