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What is the impact of an uncompetitive inhibitor on the values of Km and Vmax in enzyme kinetics?
An uncompetitive inhibitor decreases both the Km and Vmax values in enzyme kinetics.
Where does an uncompetitive inhibitor bind in relation to the enzyme-substrate complex?
An uncompetitive inhibitor binds to the enzyme-substrate complex after the substrate has already bound to the enzyme.
How does the uncompetitive inhibitor affect both the Km and Vmax values in enzyme kinetics?
An uncompetitive inhibitor affects both the Km and Vmax values in enzyme kinetics by decreasing the apparent Km value and reducing the Vmax value.
What is the impact of an uncompetitive inhibitor on the Michaelis constant (Km) in enzyme kinetics?
An uncompetitive inhibitor decreases the Michaelis constant (Km) in enzyme kinetics. This means that the enzyme's affinity for its substrate is increased, requiring lower substrate concentrations to reach half of the maximum reaction rate.
What type of inhibitor is cinnamic acid?
Cinnamic acid is a competitive inhibitor. It competes with the substrate for binding to the enzyme's active site.
What are the key differences between uncompetitive and non-competitive inhibition in enzyme kinetics?
Uncompetitive inhibition occurs when the inhibitor binds only to the enzyme-substrate complex, while non-competitive inhibition happens when the inhibitor binds to both the enzyme and the enzyme-substrate complex. Uncompetitive inhibition decreases the maximum reaction rate, while non-competitive inhibition reduces the enzyme's ability to bind to the substrate.
Is uncompetitive inhibition an example of allosteric regulation in enzyme activity?
Yes, uncompetitive inhibition is an example of allosteric regulation in enzyme activity.
Why does the Michaelis constant (Km) decrease in uncompetitive inhibition?
In uncompetitive inhibition, the Michaelis constant (Km) decreases because the inhibitor binds to the enzyme-substrate complex, which lowers the affinity of the enzyme for the substrate. This results in a decrease in the Km value.
What is Difference between uncompetitive and non competitive enzyme inhibition?
Uncompetitive inhibition occurs when the inhibitor binds only to the enzyme-substrate complex, preventing the release of the product. Noncompetitive inhibition occurs when the inhibitor binds to both the enzyme and the enzyme-substrate complex, altering the enzyme's shape and reducing its activity.
What is the relationship between uncompetitive inhibition and the Michaelis constant (Km) in enzyme kinetics?
In uncompetitive inhibition, the inhibitor binds to the enzyme-substrate complex, not the free enzyme. This type of inhibition does not affect the Michaelis constant (Km) but decreases the maximum reaction rate (Vmax) of the enzyme.
Why does the maximum velocity (Vmax) decrease in uncompetitive inhibition?
In uncompetitive inhibition, the maximum velocity (Vmax) decreases because the inhibitor binds to the enzyme-substrate complex, preventing the enzyme from catalyzing the reaction effectively. This results in a decrease in the rate at which the product is formed, leading to a lower maximum velocity.
What is an example of a MAO-B inhibitor?
Selegiline is an MAO-B inhibitor
