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-   -   In the lab, you isolate and purify the following peptide: Lys-Ala-Asp-His.? (http://www.molecularstation.com/forum/peptide-forum/87446-lab-you-isolate-purify-following-peptide-lys-ala-asp-his.html)

sheila k 01-30-2013 07:16 PM

In the lab, you isolate and purify the following peptide: Lys-Ala-Asp-His.?
 
In the lab, you isolate and purify the following peptide:
Lys-Ala-Asp-His.
a. draw a structural diagram of this peptide as it would exist in an aqueous buffered
solution of pH = 6.9.
b. What is the net charge on this peptide within this buffered solution?
c. Would you expect the net charge on this peptide to change if it was in an aqueous
buffered solution of pH = 5.2?
d. In which of the above-buffered solutions, if any, would you refer to this peptide as
a zwitterion?


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