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Analysis of the kinetic isotope effects on initial rates in transient kinetics

机译:瞬态动力学初始速率的动力学同位素效应分析

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摘要

A method was described recently for circumventing the difficulties in determining intrinsic kinetic isotope effects from eigenvalues obtained in transient kinetic experiments ( Maniscalco, Tally, and Fisher ( 2004) Arch. Biochem. Biophys. 425, 165- 172). The method, based on the isotope effects on initial rates of formation of intermediates, was validated by numerical simulation for only a few linear reaction sequences. A general analytical proof of the validity of the method is given in this work. The mathematical approach, using rate laws and L'Hopital's rule, allows more complex reaction schemes to be analyzed. Several are analyzed in this article, illustrating the broad applicability and possible complications in this approach for determining intrinsic isotope effects. Some possible applications are noted, with particular attention being paid to nonlinear reaction schemes, the effect of measuring signals rather than concentration, and the ability to distinguish stepwise from concerted reactions.
机译:最近描述了一种方法,以避免确定在瞬态动力学实验(Maniscalco,Tally和Fisher(2004)拱门中获得的特征值的内在动力学同位素效应的困难。生物学。Biophys。425,165-172)。该方法基于同位素对中间体形成初始速率的同位素效应,通过数值模拟仅验证了几种线性反应序列。在这项工作中给出了该方法有效性的一般分析证据。使用速率法律和L'Hopital的规则的数学方法允许分析更复杂的反应方案。在本文中分析了几种,说明了这种方法中的广泛适用性和可能的​​并发症,用于确定内在同位素效应。注意一些可能的应用,特别注意非线性反应方案,测量信号而不是浓度的效果,以及从协调反应中逐步区分的能力。

著录项

  • 来源
    《Biochemistry》 |2006年第45期|共10页
  • 作者

    Palfey BA; Fagan RL;

  • 作者单位

    Univ Michigan Sch Med Dept Biol Chem Ann Arbor MI 48109 USA;

    o-box.mcgill.ca;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 生物化学;
  • 关键词

    STEP;

    机译:步;

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