2. Enzyme-catalysed reactions are sometimes subject to inhibition by the substrate.Assuming that the reaction mechanism can be approximated by the followingmodel, derive an expression for the reaction velocity in terms of S, Eo andreaction constants. State your assumptions.Dissociation constantE +S S ESK,ES + S S ESSK,'kES - E+P

Answered: Enzyme-catalysed reactions are…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

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2. Enzyme-catalysed reactions are sometimes subject to inhibition by the substrate.
Assuming that the reaction mechanism can be approximated by the following
model, derive an expression for the reaction velocity in terms of S, Eo and
reaction constants. State your assumptions.
Dissociation constant
E +S S ES
K,
ES + S S ESS
K,'
k
ES - E+P

Expert Solution

Step 1

Enzyme catalyzed reactions are sometimed subjected to inhibition by substrate.

At constant concentrations of the other substrates, most enzymes with two components follow the Michaelis-Menten equation with regard to one substrate. A rectangular hyperbola is used to depict the reaction's speed in this instance, wherein a substrate is changed while the rest are kept the same. The following reaction kinetics is followed by enzymes with two substrates (A and B) that show spontaneous or compulsory-ordered reactions resulting in the generation of a ternary complex.

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