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The Enzyme Inhibitor Dissociation Constant is measured by the method in which the inhibitor is titrated into a solution of enzyme and the heat released or absorbed is measured. Check FAQs
Ki=I((k2[E0]SV0)-SKM)-1
Ki - Enzyme Inhibitor Dissociation Constant?I - Inhibitor Concentration?k2 - Final Rate Constant?[E0] - Initial Enzyme Concentration?S - Substrate Concentration?V0 - Initial Reaction Rate?KM - Michaelis Constant?

Dissociation Constant for Competitive Inhibition of Enzyme Catalysis Example

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Here is how the Dissociation Constant for Competitive Inhibition of Enzyme Catalysis equation looks like with Values.

Here is how the Dissociation Constant for Competitive Inhibition of Enzyme Catalysis equation looks like with Units.

Here is how the Dissociation Constant for Competitive Inhibition of Enzyme Catalysis equation looks like.

0.0035Edit=9Edit((23Edit100Edit1.5Edit0.45Edit)-1.5Edit3Edit)-1
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Dissociation Constant for Competitive Inhibition of Enzyme Catalysis Solution

Follow our step by step solution on how to calculate Dissociation Constant for Competitive Inhibition of Enzyme Catalysis?

FIRST Step Consider the formula
Ki=I((k2[E0]SV0)-SKM)-1
Next Step Substitute values of Variables
Ki=9mol/L((23s⁻¹100mol/L1.5mol/L0.45mol/L*s)-1.5mol/L3mol/L)-1
Next Step Convert Units
Ki=9000mol/m³((23s⁻¹100000mol/m³1500mol/m³450mol/m³*s)-1500mol/m³3000mol/m³)-1
Next Step Prepare to Evaluate
Ki=9000((231000001500450)-15003000)-1
Next Step Evaluate
Ki=3.5238074522002mol/m³
Next Step Convert to Output's Unit
Ki=0.0035238074522002mol/L
LAST Step Rounding Answer
Ki=0.0035mol/L

Dissociation Constant for Competitive Inhibition of Enzyme Catalysis Formula Elements

Variables
Enzyme Inhibitor Dissociation Constant
The Enzyme Inhibitor Dissociation Constant is measured by the method in which the inhibitor is titrated into a solution of enzyme and the heat released or absorbed is measured.
Symbol: Ki
Measurement: Molar ConcentrationUnit: mol/L
Note: Value can be positive or negative.
Inhibitor Concentration
The Inhibitor concentration is defined as the number of moles of inhibitor present per liter of solution of the system.
Symbol: I
Measurement: Molar ConcentrationUnit: mol/L
Note: Value can be positive or negative.
Final Rate Constant
The Final Rate Constant is the rate constant when the enzyme-substrate complex on reaction with inhibitor is converted into the enzyme catalyst and product.
Symbol: k2
Measurement: First Order Reaction Rate ConstantUnit: s⁻¹
Note: Value can be positive or negative.
Initial Enzyme Concentration
The Initial Enzyme Concentration is defined as the concentration of enzyme at the start of the reaction.
Symbol: [E0]
Measurement: Molar ConcentrationUnit: mol/L
Note: Value should be greater than 0.
Substrate Concentration
The Substrate Concentration is the number of moles of substrate per liter solution.
Symbol: S
Measurement: Molar ConcentrationUnit: mol/L
Note: Value can be positive or negative.
Initial Reaction Rate
The Initial Reaction Rate is defined as the initial speed at which a chemical reaction takes place.
Symbol: V0
Measurement: Reaction RateUnit: mol/L*s
Note: Value can be positive or negative.
Michaelis Constant
The Michaelis Constant is numerically equal to the substrate concentration at which the reaction rate is half of the maximum rate of the system.
Symbol: KM
Measurement: Molar ConcentrationUnit: mol/L
Note: Value can be positive or negative.

Other Formulas to find Enzyme Inhibitor Dissociation Constant

​Go Dissociation Constant in Competitive Inhibition given Maximum Rate of System
Ki=I((VmaxSV0)-SKM)-1

Other formulas in Competitive Inhibitor category

​Go Apparent Value of Michaelis Menten Constant in Presence of Competitive Inhibition
Kmapp=S(Vmax-V0)V0
​Go Substrate Concentration of Competitive Inhibition of Enzyme Catalysis
S=V0(KM(1+(IKi)))(k2[E0])-V0

How to Evaluate Dissociation Constant for Competitive Inhibition of Enzyme Catalysis?

Dissociation Constant for Competitive Inhibition of Enzyme Catalysis evaluator uses Enzyme Inhibitor Dissociation Constant = Inhibitor Concentration/(((((Final Rate Constant*Initial Enzyme Concentration*Substrate Concentration)/Initial Reaction Rate)-Substrate Concentration)/Michaelis Constant)-1) to evaluate the Enzyme Inhibitor Dissociation Constant, The Dissociation constant for competitive inhibition of enzyme catalysis formula is defined as a plot of the reaction velocity (V0) associated with the concentration [S] of the substrate which can then be used to determine values such as Vmax, initial velocity, and Km. Enzyme Inhibitor Dissociation Constant is denoted by Ki symbol.

How to evaluate Dissociation Constant for Competitive Inhibition of Enzyme Catalysis using this online evaluator? To use this online evaluator for Dissociation Constant for Competitive Inhibition of Enzyme Catalysis, enter Inhibitor Concentration (I), Final Rate Constant (k2), Initial Enzyme Concentration ([E0]), Substrate Concentration (S), Initial Reaction Rate (V0) & Michaelis Constant (KM) and hit the calculate button.

FAQs on Dissociation Constant for Competitive Inhibition of Enzyme Catalysis

What is the formula to find Dissociation Constant for Competitive Inhibition of Enzyme Catalysis?
The formula of Dissociation Constant for Competitive Inhibition of Enzyme Catalysis is expressed as Enzyme Inhibitor Dissociation Constant = Inhibitor Concentration/(((((Final Rate Constant*Initial Enzyme Concentration*Substrate Concentration)/Initial Reaction Rate)-Substrate Concentration)/Michaelis Constant)-1). Here is an example- 3.5E-6 = 9000/(((((23*100000*1500)/450)-1500)/3000)-1).
How to calculate Dissociation Constant for Competitive Inhibition of Enzyme Catalysis?
With Inhibitor Concentration (I), Final Rate Constant (k2), Initial Enzyme Concentration ([E0]), Substrate Concentration (S), Initial Reaction Rate (V0) & Michaelis Constant (KM) we can find Dissociation Constant for Competitive Inhibition of Enzyme Catalysis using the formula - Enzyme Inhibitor Dissociation Constant = Inhibitor Concentration/(((((Final Rate Constant*Initial Enzyme Concentration*Substrate Concentration)/Initial Reaction Rate)-Substrate Concentration)/Michaelis Constant)-1).
What are the other ways to Calculate Enzyme Inhibitor Dissociation Constant?
Here are the different ways to Calculate Enzyme Inhibitor Dissociation Constant-
  • Enzyme Inhibitor Dissociation Constant=Inhibitor Concentration/(((((Maximum Rate*Substrate Concentration)/Initial Reaction Rate)-Substrate Concentration)/Michaelis Constant)-1)OpenImg
Can the Dissociation Constant for Competitive Inhibition of Enzyme Catalysis be negative?
Yes, the Dissociation Constant for Competitive Inhibition of Enzyme Catalysis, measured in Molar Concentration can be negative.
Which unit is used to measure Dissociation Constant for Competitive Inhibition of Enzyme Catalysis?
Dissociation Constant for Competitive Inhibition of Enzyme Catalysis is usually measured using the Mole per Liter[mol/L] for Molar Concentration. Mole per Cubic Meter[mol/L], Mole per Cubic Millimeter[mol/L], Kilomole per Cubic Meter[mol/L] are the few other units in which Dissociation Constant for Competitive Inhibition of Enzyme Catalysis can be measured.
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