期刊
BIOPHYSICAL JOURNAL
卷 86, 期 1, 页码 467-472出版社
BIOPHYSICAL SOCIETY
DOI: 10.1016/S0006-3495(04)74124-7
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- PHS HHS [P01 48364] Funding Source: Medline
We performed pressure-tuning hole-burning experiments on a modified cytochrome c protein in a glycerol/buffer glass. The shift and the broadening of the holes were investigated for various frequencies within the inhomogeneous band. On the basis of a simple model, we were able to estimate the interaction range between chromophore and protein. It is similar to4.5 Angstrom. The parameters that enter the model are the compressibility, the static mean-square displacement, the inhomogeneous width, and the average spectral shift per pressure. From this result and from our experiments on pressure-induced denaturing, we conclude that water molecules have to be brought very close to the chromophore during the denaturation process.
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