Ultrafast energy transfer and structural dynamics in DNA

Article Abstract:

Ultrafast structural dynamics concomitant to excitation energy transfer in DNA is studied using a pair of pyrene-labeled DNA bases. The temporal evolution of the femtosecond pump-probe spectra reveals the existence of two electronic coupling pathways, through-base stack and through-space, which lead to excitation energy transfer and excimer formation, the local structural dynamics and flexibility and flexibility of DNA are characterized on the picosecond and nanosecond time scale.

Excited state chemistry

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Fluorescence resonance energy transfer in CdSe/ZnS-DNA conjugates: Probing hybridization and DNA cleavage

Article Abstract:

The nucleic-acid-functionalized CdSe/ZnS quantum dots (QDs) hybridized were monitored, following the transfer of fluorescence resonance energy from the QDs to the dye units. The treatment of the Qd/dye DNA with DNase I resulted in the cleavage of the DNA and the recovery of the fluorescence properties of the CdSe/ZnS QDs.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Cadmium Compounds, Selenium Compounds, Analysis

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Natural DNA mixed with trehalose persists in B-form double stranding even in the dry state

Article Abstract:

The desiccated calf-thymus DNA persists in B-form double-stranding when mixed with trehalose. The strong hydrogen bonding capacity of trehalose with phosphate groups of DNA causes screening of the large phosphate-phosphate repulsion and stabilizes the DNA.

Drying, Report, Trehalose

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