constant /con·stant/ (kon´stint)
1. stable; not subject to change.
2. a quantity that is not subject to change.
association constant a measure of the extent of a reversible association between two molecular species.
Avogadro's constant see under number.
binding constant association c.
Michaelis constant a constant representing the substrate concentration at which the velocity of an enzyme-catalyzed reaction is half maximal; symbol K M or K m.
sedimentation constant see under coefficient.
Mi·chae·lis constant (m -k  ls) or Michaelis-Men·ten constant (-m nt n)n. A constant that is equal to the substrate concentration at which an enzyme reaction proceeds at half the maximum velocity. |
Michaelis constant, Michaelis-Mentin constant
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