NotesFAQContact Us
Collection
Advanced
Search Tips
Back to results
Peer reviewed Peer reviewed
Direct linkDirect link
ERIC Number: EJ998963
Record Type: Journal
Publication Date: 2012-Jun
Pages: 6
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0021-9584
EISSN: N/A
Illustrating Enzyme Inhibition Using Gibbs Energy Profiles
Bearne, Stephen L.
Journal of Chemical Education, v89 n6 p732-737 Jun 2012
Gibbs energy profiles have great utility as teaching and learning tools because they present students with a visual representation of the energy changes that occur during enzyme catalysis. Unfortunately, most textbooks divorce discussions of traditional kinetic topics, such as enzyme inhibition, from discussions of these same topics in terms of Gibbs energy profiles. Examination of the changes in the values of the apparent kinetic parameters KS[superscript app], k[subscript cat][superscript app], and (k[subscript cat]/K[subscript M])[superscript app] in response to various modes of inhibition may be informative to students when presented in combination with Gibbs energy profiles. Herein, the symbolism of standard Gibbs energy profiles is utilized to derive expressions for the changes in Gibbs energy associated with the apparent kinetic parameters and to describe their behavior in the presence of either a competitive, uncompetitive, noncompetitive, or linear mixed-type inhibitor under rapid equilibrium conditions. The approach is intuitive and complementary to the traditional derivations of enzyme kinetic equations. (Contains 2 figures.)
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A