Lisa is running an experiment to determine the kinetic parameters (Kmand Vmax) of the enzyme that she is studying. She has run a series of experiments where she changed the amount of substrate added and measured the accumulation of product over a 5 second time interval. She used this data to calculate the dependence of the rate of the reaction on substrate concentration. Her results listed below. Substrate Concentration (mM) Velocity (mM/sec) 1 2 5 2.5 4 6.3 10 7.6 20 1. Using this information construct a Michaelis-Menten curve. 2. Using this information construct a Lineweaver-Burk plot. 3. Using the Lineweaver-Burk plot determine the values of Km and Vmax.

Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter18: Chemical Kinetics
Section: Chapter Questions
Problem 75AP
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Hello, can someone please help me? I have already hand graphed 1 and 2 and found the v max, however I cannot find the Km value. I am confused because the plots on the linear weaver burk plot do not extend past the values that make up the line. So how am I supposed to estimate the value for the y-intercept in order to find the Km value

 

 

 

Lisa is running an experiment to determine the kinetic parameters (Km and Vmax) of
the enzyme that she is studying. She has run a series of experiments where she
changed the amount of substrate added and measured the accumulation of product
over a 5 second time interval. She used this data to calculate the dependence of the
rate of the reaction on substrate concentration. Her results listed below.
Substrate
Concentration (mM)
Velocity (mM/sec)
2.5
4
6.3
7.6
1
10
20
You need to hand-
1. Using this information construct a Michaelis-Menten curve.
draw on graph
2. Using this information construct a Lineweaver-Burk plot.
paper (no excel),
3. Using the Lineweaver-Burk plot determine the values of Km and Vmax.
Scan and upload it
Transcribed Image Text:Lisa is running an experiment to determine the kinetic parameters (Km and Vmax) of the enzyme that she is studying. She has run a series of experiments where she changed the amount of substrate added and measured the accumulation of product over a 5 second time interval. She used this data to calculate the dependence of the rate of the reaction on substrate concentration. Her results listed below. Substrate Concentration (mM) Velocity (mM/sec) 2.5 4 6.3 7.6 1 10 20 You need to hand- 1. Using this information construct a Michaelis-Menten curve. draw on graph 2. Using this information construct a Lineweaver-Burk plot. paper (no excel), 3. Using the Lineweaver-Burk plot determine the values of Km and Vmax. Scan and upload it
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