Time-resolved CINDP study of non-native states of bovine and human alpha-lactalbumins

Article Abstract:

The reaction mechanism and details of the formation of CIDNP (chemically induced dynamic nuclear polarization) in the photoreactions of the aromatic dye 2,2'-dipyridyl with non-native states of bovine and human alpha-lactalbumins in aqueous solution are studied using the time-resolved CIDNP technique. Relative intensities of the signals in the geminate CIDNP spectra can be used to give information on the accessibility and reactivity of amino acid residues toward the excited dye molecules.

Amino acids

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Intramolecular electron transfer in lysozyme studied by time-resolved chemically induced dynamic nuclear polarization

Article Abstract:

The kinetics of the chemically induced dynamic nuclear polarization (CIDNP) produced in reactions of hen lysozyme with photosensitizers was studied for the native state of protein. The detailed analysis of the CIDNP time dependence on a microsecond time scale revealed that in both denatured states, intramolecular electron transfer from a tyrosine residue to the cation radical of tryptophan residue is highly efficient and plays a decisive role in the evolution of the nuclear polarization.

Optical properties, Electron transport, Lysozyme

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Time-resolved CIDNP study of native-state bovine and human alpha-lactalbumins

Article Abstract:

The reaction mechanism and details of the formation of CIDNP in the photoreactions of two aromatic dyes with bovine and human alpha-lactalbumins in aqueous solution is examined with the help of time-resolved CIDNP technique. The correlation times for the side chain motion as determined from the T1 of the radicals are correlated with the accessibility of the side chains in the intact protein.

Analysis, Usage, Nuclear magnetic resonance spectroscopy, Aromatic compounds, Aqueous solution reactions

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