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constant
(redirected from Michaelis constant (Km))

   Also found in: Dictionary/thesaurus, Medical, Legal, Financial, Wikipedia, Hutchinson 0.02 sec.

constant

In programming, a fixed value in a program. Minimum and maximum amounts, dates, prices, headlines and error messages are examples.


constant
1. a specific quantity that is always invariable
2. 
a. Maths a symbol representing an unspecified number that remains invariable throughout a particular series of operations
b. Physics a theoretical or experimental quantity or property that is considered invariable throughout a particular series of calculations or experiments

constant [′kän·stənt]
(science and technology)
A value that does not change during a particular process.


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This paper presents an undergraduate laboratory exercise that allows for the experimental determination of the typical enzyme-kinetics parameters [the Michaelis constant (KM), the maximum rate of the enzyme-catalyzed reaction (Vmax), the turnover number (kcat), and the catalytic efficiency of the enzyme system at low substrate concentrations (kcat/KM)] using a standard benchtop multi-cell UV-vis spectrophotometer.
 
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