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Related Experiment Videos

Positional isotope exchange.

F M Raushel1, J J Villafranca

  • 1Department of Chemistry, Texas A and M University, College Station.

CRC Critical Reviews in Biochemistry
|January 1, 1988
PubMed
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Positional isotope exchange reveals high-energy intermediates in enzyme reactions. This method is useful for intermediates lacking clear electronic spectra, offering insights into reaction mechanisms.

Area of Science:

  • Biochemistry
  • Chemical Kinetics

Background:

  • Enzyme-catalyzed reactions often involve transient intermediates.
  • Detecting intermediates with no distinct electronic spectra presents a challenge.

Purpose of the Study:

  • To review the application of positional isotope exchange for studying enzyme reaction intermediates.
  • To discuss the limitations of this technique.

Main Methods:

  • Positional isotope exchange (intramolecular isotopic scrambling) was employed.
  • This technique is suitable for intermediates lacking easily observable electronic spectra.
  • Isotope exchange phenomena were utilized.

Main Results:

  • Positional isotope exchange has been successfully applied to several reactions.

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  • These reactions were previously hypothesized to involve high-energy intermediates.
  • The study reviews specific reaction examples.

    • Conclusions:

    • Positional isotope exchange is a valuable tool for detecting elusive reaction intermediates.
    • The method's applicability and limitations in studying enzyme mechanisms are highlighted.