Lineweaver burk equation
What is the significance of using the Lineweaver Burk equation?
The Lineweaver–Burk plot was widely used to determine important terms in enzyme kinetics, such as Km and Vmax, before the wide availability of powerful computers and non-linear regression software. The y-intercept of such a graph is equivalent to the inverse of Vmax; the x-intercept of the graph represents −1/Km.
How do you calculate Vmax Lineweaver?
Ease of Calculating the Vmax in Lineweaver-Burk Plot Since the slope-intercept equation relates the rate to the concentration of the substrate, you can use the typical formula of y = mx + b, where y is the dependent variable, m is the slope, x is the independent variable, and b is the y-intercept.
What is km in Lineweaver Burk plot?
Lineweaver–Burk Plot. where V is the reaction velocity (the reaction rate), Km is the Michaelis–Menten constant, Vmax is the maximum reaction velocity, and [S] is the substrate concentration.
How do you plot a Lineweaver Burk plot?
For a Lineweaver-Burk, the manipulation is using the reciprocal of the values of both the velocity and the substrate concentration. The inverted values are then plotted on a graph as 1/V vs. 1/[S]. Because of these inversions, Lineweaver-Burk plots are commonly referred to as ‘double-reciprocal’ plots.
How do you calculate Vmax?
Km and Vmax are determined by incubating the enzyme with varying concentrations of substrate; the results can be plotted as a graph of rate of reaction (v) against concentration of substrate ([S], and will normally yield a hyperbolic curve, as shown in the graphs above.
What is Km and Vmax?
Vmax is the maximum rate of an enzyme catalysed reaction i.e. when the enzyme is saturated by the substrate. Km is measure of how easily the enzyme can be saturated by the substrate. Km and Vmax are constant for a given temperature and pH and are used to characterise enzymes.
How do you calculate Km value?
This is called a saturation plot or Michaelis-Menten plot. The equation that defines the Michaelis-Menten plot is: V = (Vmax [S]) ÷ (KM + [S}). At the point at which KM = [S], this equation reduces to V = Vmax ÷ 2, so KM is equal to the concentration of the substrate when the velocity is half its maximum value.
What is Vmax in Michaelis Menten equation?
The Michaelis-Menten equation for this system is: Here, Vmax represents the maximum velocity achieved by the system, at maximum (saturating) substrate concentrations. KM (the Michaelis constant; sometimes represented as KS instead) is the substrate concentration at which the reaction velocity is 50% of the Vmax.
What units is Vmax measured in?
Vmax “represents the maximum rate achieved by the system, at maximum (saturating) substrate concentrations” (wikipedia). Unit: umol/min (or mol/s).
What method did the students use to calculate Vmax?
Vmax was determined as the fastest initial rate of Compound 2 formation obtained during the kinetics experiments from the passage. C) Vmax was calculated as [S] × kcat for the trial with the highest substrate concentration.
Is Michaelis Menten vs Lineweaver Burk more accurate?
For instance; Lineweaver-Burke plot, the most favoured plot by researchers, has two distinct advantages over the Michaelis-Menten plot, in that it gives a more accurate estimate of Vmax and more accurate information about inhibition. It increases the precision by linearizing the data.