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Definition: This calculator determines the initial reaction rate of an enzyme-catalyzed reaction using the Michaelis-Menten kinetics model that incorporates the dissociation rate constant.
Purpose: It helps biochemists and researchers estimate reaction rates under specific substrate concentrations and enzyme conditions.
The calculator uses the formula:
Where:
Explanation: The formula describes how the reaction rate depends on substrate concentration and the enzyme's affinity for the substrate (represented by KD).
Details: Understanding reaction rates helps in enzyme characterization, drug development, and metabolic pathway analysis.
Tips: Enter the maximum reaction rate, substrate concentration, and dissociation rate constant. All values must be > 0.
Q1: What is Vmax in enzyme kinetics?
A: Vmax is the maximum reaction rate achieved when all enzyme active sites are saturated with substrate.
Q2: How does KD relate to enzyme affinity?
A: A lower KD indicates higher enzyme-substrate affinity, meaning the enzyme binds the substrate more tightly.
Q3: What units should I use for inputs?
A: The calculator uses SI units: mol/m³ for concentrations and mol/m³·s for reaction rates.
Q4: When is this model applicable?
A: This applies to simple enzyme-substrate reactions following Michaelis-Menten kinetics.
Q5: How do I determine KD experimentally?
A: KD can be determined through equilibrium binding studies or kinetic measurements.