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Inhibition Constant definitions

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  • Inhibition Constant
    Dissociation constant for enzyme-inhibitor complex; lower values indicate stronger binding affinity between enzyme and inhibitor.
  • Enzyme-Inhibitor Complex
    Structure formed when an inhibitor binds to a free enzyme, preventing catalytic activity.
  • Enzyme-Substrate Complex
    Intermediate formed when an enzyme binds its substrate, essential for catalysis and inhibition studies.
  • Enzyme-Substrate-Inhibitor Complex
    Complex resulting from inhibitor binding to the enzyme-substrate complex, halting the reaction.
  • Binding Affinity
    Strength of interaction between enzyme and inhibitor; inversely related to inhibition constant value.
  • Dissociation Constant
    Ratio describing how readily a complex separates into its components; used to quantify binding strength.
  • Steady State Conditions
    Situation where concentrations of reaction intermediates remain constant during catalysis.
  • Rate Constant
    Parameter indicating the speed of formation or breakdown of enzyme complexes under specific conditions.
  • KEI
    Rate constant for association of enzyme and inhibitor to form the enzyme-inhibitor complex.
  • K−EI
    Rate constant for dissociation of the enzyme-inhibitor complex into free enzyme and inhibitor.
  • KESI
    Rate constant for association of enzyme-substrate complex and inhibitor to form the enzyme-substrate-inhibitor complex.
  • K−ESI
    Rate constant for dissociation of the enzyme-substrate-inhibitor complex into enzyme-substrate and inhibitor.
  • KI
    Dissociation constant for the enzyme-inhibitor complex; quantifies free enzyme's affinity for inhibitor.
  • K'I
    Dissociation constant for the enzyme-substrate-inhibitor complex; measures affinity of enzyme-substrate for inhibitor.
  • Michaelis Constant
    Parameter representing substrate concentration at which reaction velocity is half-maximal; analogous to inhibition constant.