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Mixed Inhibition definitions

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  • Mixed Inhibition
    A reversible enzyme inhibition where inhibitors bind both free enzyme and enzyme-substrate complex at allosteric sites, altering kinetic parameters.
  • Allosteric Site
    A location on an enzyme distinct from the active site, where inhibitors can bind and modulate enzyme activity without direct substrate competition.
  • Free Enzyme
    The unbound form of an enzyme, available for substrate or inhibitor binding, crucial in mixed inhibition dynamics.
  • Enzyme-Substrate Complex
    A transient association between enzyme and substrate, which can also bind inhibitors in mixed inhibition.
  • Inhibition Constant (Ki)
    A measure of inhibitor affinity for the free enzyme, influencing the degree of inhibition in mixed inhibition.
  • Inhibition Constant (Ki')
    A measure of inhibitor affinity for the enzyme-substrate complex, distinct from Ki in mixed inhibition.
  • Michaelis Constant (Km)
    A parameter reflecting enzyme affinity for substrate, which can increase or decrease in mixed inhibition depending on inhibitor binding.
  • Maximum Velocity (Vmax)
    The highest possible rate of an enzyme-catalyzed reaction, always reduced in the presence of mixed inhibitors.
  • Catalytic Constant (kcat)
    The turnover number representing the number of substrate molecules converted per enzyme per unit time, decreased by mixed inhibition.
  • Alpha
    A factor quantifying the degree of inhibition on the free enzyme, determining changes in Km during mixed inhibition.
  • Alpha Prime
    A factor quantifying the degree of inhibition on the enzyme-substrate complex, affecting both Km and Vmax in mixed inhibition.
  • Le Chatelier's Principle
    A concept explaining how changes in inhibitor binding shift equilibrium, dictating whether Km increases or decreases in mixed inhibition.
  • Michaelis-Menten Plot
    A graphical representation of enzyme kinetics, altered by mixed inhibition through changes in apparent Km and Vmax.
  • Lineweaver-Burk Plot
    A double-reciprocal plot of enzyme kinetics, where mixed inhibition modifies slope and intercepts based on changes in Km and Vmax.
  • Apparent Km
    An adjusted Michaelis constant reflecting the influence of mixed inhibitors, which can be higher or lower than the original Km.