Reversible energy-transfer switching on a DNA scaffold.
Reversible energy-transfer switching on a DNA scaffold.
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DOI:
10.1021/ja512416n
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发表时间:
2015-02-25
影响因子:
15
通讯作者:
Andreasson, Joakim
中科院分区:
文献类型:
--
作者:
Baelter, Magnus;Harnmarson, Martin;Remon, Patricia;Li, Shiming;Gale, Nittaya;Brown, Tom;Andreasson, Joakim
We show that FRET between Pacific Blue (PB) and Alexa488 (A488) covalently attached to a DNA scaffold can be reversibly controlled by photochromic switching of a spiropyran derivative. With the spiropyran in the closed spiro isomeric form, FRET occurs freely between PB and A488. UV-induced isomerization to the open merocyanine form shuts down the FRET process by efficient quenching of the PB excited state. The process is reversed by exposure to visible light, triggering the isomerization to the spiro isomer.
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