Medical Dictionary
Michaelis–Menten kinetics
noun pl but singular or pl in constr Mi·chae·lis–Men·ten kinetics \-ˈmen-tən-\
Medical Definition of MICHAELIS-MENTEN KINETICS
: the behavior of an enzyme-catalyzed reaction with a single substrate especially as exhibited by plotting the velocity of the reaction against the concentration of the substrate which yields a hyperbolic curve approaching a horizontal asymptote rather than yielding a straight line as in nonenzymatic reactions and which has an equation of the form 
where versus is the velocity of the reaction, V is the asymptotic value of the velocity, Km is the Michaelis constant, and s is the concentration of the substrate
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