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MBA, Ph.D in Management
Harvard university
Feb-1997 - Aug-2003
Professor
Strayer University
Jan-2007 - Present
 An unknown protein (i.e., not BSA) binds to Carboxy Methyl (CM) -cellulose (pKa 4) at pH 7.0.
The loading buffer is 0.1M imidazole pH7.
5a. Draw the two structural forms of the CM functional group. (Hint:Â see second page).
State the charge on the form which predominates at pH 7.0.
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b.      What is the charge on the protein at pH 7.0? Explain.
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c.      How can the bound protein be eluted from this particular resin?
Explain using 2 different methods describing the type of buffer used for each elution.
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d.      What can you conclude about the pI of the bound protein? Explai
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