The following chart shows the data for the oxidation of a substrate to enzyme. The reaction is followed by monitoring the change in absorbance at 540nm. Create a Michaelis-Menten plot and a Lineweaver-Burk plot. Determine from each plot the K_{M} and V_{max}.
[S] (mM) | 0.3 | 0.6 | 1.2 | 4.8 |
Rate (ΔAbs/min) | 0.020 | 0.035 | 0.048 | 0.081 |
The following chart shows the data for the oxidation of a substrate to enzyme. The reaction...
(I need help with part C, Drawing the expected Michaelis-Menten plot; Do NOT draw the Lineweaver-Burk plot. thanks!) 1. Michaelis-Menten kinetics- use the M-M equation to answer the following: a. An enzyme (5 µM) has a Vmax of 450 mM/min. What is kcat? b. When the substrate concentration is 50 mM, the initial velocity (V0) was measured to be 375 mM/min. Under the conditions described above, calculate the KM. c. Draw the expected Michaelis-Menten plot (label your axes and include...
CHEM3250 Assignment-Enzyme Inhibition Consider the data below for an enzyme catalyzed reaction. The rate of the reaction has been determined with and without an inhibitor. A total concentration of enzyme of 20 uM was used in the experiment. SHOW WORK AND UNITS!!! Without Inhibitor With Inhibitor [substrate] (mM)Rate of formation of te of formation of product product (mM/min) mM/min) 6.67 5.25 0.49 7.04 38.91 1.0 2.2 6.9 41.8 44.0 1.5 3.5 1 a) On the same graph, plot the data...
112 marks] 3. The relationship between initial velocity (V.) and substrate concentration of most of the enzyme- catalized reactions are explained by Michaelis-Menten equation. IMPORTANT: Show the calculations and indicate the units for all your answers. a. For an enzyme which follows the Michaelis-Menten enzyme kinetics, Km is 50 mmol L. Calculate the substrate concentration required to obtain the initial velocity (V.) equivalent to 90% of the maximum velocity (Vmax). b. The Vmax of the above reaction is 250 mmol...
3. Why is an allosteric enzyme more sensitive to substrate concentration around Km values than a Michaelis-Menten enzyme with the same Vmax? 4. Explain how pH and temperature influence enzyme activity. ( A Lineweaver-Burk (double reciprocal) plot was used to compare the effects of three different reversible inhibitors (A, B and C) on an enzyme. The plot of 1/V vs 1/[S] for the enzyme with no inhibitor is shown in a solid black line. The plot of 1/V vs 1/[S]...
Enzyme Kinetics Problem The initial rate for an enzyme-catalyzed reaction has been determined at a number of substrate concentrations. Data are given below: 5 27 23 65 1. Estimate V and K from a Michaelis-Menten graph of V versus [S] 2. Use a Lineweaver-Burk plot to analyze the same data. a. Determine V and Ka from the Lineweaver-Burk BONUS: If the total enzyme concentration was I nmol/L, what is K? Enzyme Kinetics Problem The initial rate for an enzyme-catalyzed reaction...
Michaelis-Menten plot and Lineweaver-Burk plot calculations: Use provided data to generate both M-M and L-B plots. Use scatter plots with markers on Excel: On the M-M Plot: estimate Vmax, KM On the L-B Plot: determine Vmax, KM, keat, kcat/Km. The total enzyme concentration is 5 uM. Graphs can be 1/2 page. Must be computer generated with all axes labeled. Substrate (mM) V. (mM/s) | 1/[S] (mM1) 1/V. (s/mM) 10 | 0 2.73 5.45 8.17 10.9 40.4 0.124 0.181 0.212 0.228...
1. The turnover number for an enzyme is known to be 5000 min. From the following set of data, calculate the Km, Vmax and the amount of enzyme present in this experiment. Use excel to obtain the lineweaver burk plot. Substrate concentration (MM) 1 Initial velocity (umol/min) 167 250 334 376 498 499 100 1,000
The kinetic data given below are for an enzyme in the absence and presence of a reversible inhibitor. From the data, generate both a Michaelis-Menten and Linweaver-Burk Plot for both that uninbibited and inhibited reactions. Graph both the uninhibited and inhibited data on the same plot. From these data calculate the Vmax and Km for the enzyme in absence and presence of the inhibitor. Is the inhibitor working cometitively or noncompetitively? Explain. [S], mM Vo, mM/min Vo, mM, min with...
4. The following data were obtained from an enzyme kinetics experiment. Graph the data using a Lineweaver-Burk plot and determine, by inspection of the graph, the values for Km and Vmax. ISI (M) V (nmol/min) 0.20 0.26 0.33 1.00 1.43 1.67 2.08 3.33 5. You measured the kinetics of an enzyme activity as a function of substrate concentration (see Table). The enzyme concentration was maintained constant at a level of 1 M. [S] AM Vopmol/min 2.9 3.8 4.4 Plot the...
After collecting enzyme kinetics data using substrates in mM and reaction velocities in mM/min, you make a Lineweaver-Burk plot. Your line of best fit has the equation: y = 0.00160 x + 0.00759. Calculate the Vmax of the enzyme using the equation: 1 KM 1 - = v Vmax [S] Vmax +