Relationship between the time-dependence of a transient-state kinetic isotope effect and the location of complexes in a reaction sequence.
We prove here a new transient-state kinetic rule which states that the ratios of the first derivatives of kinetic isotope effect time courses, extrapolated to zero time, provide integral values which specify the precise step number in the reaction sequence in single isotope substituted reactions. This rule defines such absolute numbers even where the steps involved are too fast to provide measurable concentrations of intermediates and when the full reaction sequence is unknown.
Laboratory of Molecular Biochemistry, Veterans Affairs Medical Center, Department of Biochemistry, University of Kansas Medical Center, 4801 Linwood Blvd., Kansas City, Missouri 64128-2226, USA. hfisher@kumc.edu
Harvey F
HF
Fisher
Bruce A
BA
Palfey
Steven J
SJ
Maniscalco
Lawrence
L
Indyk
D007554:Isotopes; D007700:Kinetics; D008433:Mathematics; D008956:Models, Chemical; D013997:Time Factors
D007554:Isotopes