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- W1558731617 abstract "Time-resolved FTIR difference spectroscopy is a powerful tool for investigating molecular reaction mechanisms of proteins. In order to detect, beyond the large background absorbance of the protein and the water, absorbance bands of protein groups that undergo reactions, difference spectra have to be performed between a ground state and an activated state of the sample. Because the absorbance changes are small, the reaction has to be started in situ, in the apparatus, and in thin protein films. The use of caged compounds offers an elegant approach to initiate protein reactions with a nanosecond UV laser flash. Here, time-resolved FTIR and FT-Raman photolysis studies of the commonly used caged compounds, caged Pi, caged ATP, caged GTP, and caged calcium are presented. The use of specific isotopic labels allows us to assign the IR bands to specific groups. Because metal ions play an important role in many biological systems, their influence on FTIR spectra of caged compounds is discussed. The results presented should provide a good basis for further FTIR studies on molecular reaction mechanisms of energy or signal transducing proteins. As an example of such investigations, the time-resolved FTIR studies on the GTPase reaction of H-ras p21 using caged GTP is presented." @default.
- W1558731617 created "2016-06-24" @default.
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- W1558731617 date "1998-01-01" @default.
- W1558731617 modified "2023-10-16" @default.
- W1558731617 title "[12] Fourier transform infrared photolysis studies of caged compounds" @default.
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- W1558731617 doi "https://doi.org/10.1016/s0076-6879(98)91015-1" @default.
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