Mike has determined that enzyme he is attempting to purify has an isoelectric point of 4.5 (pI = 4.5). He has decided to examine anion exchange chromatography as a potential purification step. He tested out using 2 different buffer and linear NaCl gradient on HPLC (like what you did). His results are shown below. Which buffer should Mike uses for his purification (both buffer has pH higher than enzyme’s pI)? Why?
Mike has determined that enzyme he is attempting to purify has an isoelectric point of 4.5 (pI = 4.5). He has decided to examine anion exchange chromatography as a potential purification step. He tested out using 2 different buffer and linear NaCl gradient on HPLC (like what you did). His results are shown below. Which buffer should Mike uses for his purification (both buffer has pH higher than enzyme’s pI)? Why?
Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN:9781337408332
Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Chapter6: Where It Starts-photosynthesis
Section: Chapter Questions
Problem 12SQ: Which of the following substances does not participate in the CalvinBenson cycle? a. ATP b. NADPH c....
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Mike has determined that enzyme he is attempting to purify has an isoelectric point of 4.5 (pI = 4.5). He has decided to examine anion exchange chromatography as a potential purification step. He tested out using 2 different buffer and linear NaCl gradient on HPLC (like what you did). His results are shown below.
Which buffer should Mike uses for his purification (both buffer has pH higher than enzyme’s pI)? Why?
![pH 5 data
2.5
2
-A280
1.5
Enzyme activity
1
0.5
1 3 4 5 7 9 10111315171920212325272930
Fraction number](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd9036ccd-b518-40e3-89ff-336d4c576363%2F7f749290-d6db-4078-ba2d-1c910143c2e0%2F39i1jcb_processed.png&w=3840&q=75)
Transcribed Image Text:pH 5 data
2.5
2
-A280
1.5
Enzyme activity
1
0.5
1 3 4 5 7 9 10111315171920212325272930
Fraction number
![pH 8 data
2.5
A280
1.5
Enzyme activity
0.5
1 3 4 5 7 9 10111315171920212325272930
Fraction number
2.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd9036ccd-b518-40e3-89ff-336d4c576363%2F7f749290-d6db-4078-ba2d-1c910143c2e0%2F9cc6ot7_processed.png&w=3840&q=75)
Transcribed Image Text:pH 8 data
2.5
A280
1.5
Enzyme activity
0.5
1 3 4 5 7 9 10111315171920212325272930
Fraction number
2.
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