期刊
BIOPHYSICAL CHEMISTRY
卷 101, 期 -, 页码 249-254出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0301-4622(02)00176-X
关键词
kinetics; binding; oxygen; myoglobin; enzymes
A simple assumption allows the prediction of the numerical value for a 'universal' limiting kinetic rate for wholly diffusion-limited reactions between small neutral molecules and macromolecules. This prediction is compared with appropriate experimental data for binding of ligands to myoglobin and to enzymes. It is shown that in the absence of electrostatic effects, this limit is approached but not exceeded. The model also makes very specific predictions concerning the viscosity and temperature dependence of such reactions. (C) 2002 Elsevier Science B.V. All rights reserved.
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