Issue 7, 2003

Photoreaction of caged ATP studied by the time-resolved transient grating method

Abstract

The photoreaction of caged ATP, P3-[1-(2-nitrophenyl)ethyl]adenosine-5′-triphosphate, has been investigated using the time-resolved transient grating (TG) method. We found that a feature of the TG signal time profile depends sensitively on the grating wavenumber (q) after the photoexcitation of caged ATP. This q-dependent feature of the TG signal was interpreted based on a model where the ATP release rate is comparable to the molecular diffusion process. We found that the TG signals at various q can be consistently analyzed based on this model and the ATP release rate determined. The enthalpy and volume changes of the reaction have been determined by quantitative measurement of the grating and photoacoustic signals.

Graphical abstract: Photoreaction of caged ATP studied by the time-resolved transient grating method

Article information

Article type
Paper
Submitted
13 Feb 2003
Accepted
14 May 2003
First published
30 May 2003

Photochem. Photobiol. Sci., 2003,2, 767-773

Photoreaction of caged ATP studied by the time-resolved transient grating method

J. Choi and M. Terazima, Photochem. Photobiol. Sci., 2003, 2, 767 DOI: 10.1039/B301745A

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