7. Aspartic acid has a side chain bearing a carboxylic acid group; its pK, is 4. The a-amino and a-carboxylic groups have pK, values similar to those of alanine. Determine the net charge on aspartic acid at the following pH values: pH 1 pH 2 pH 4 pH 9 pH 13

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6. Using the charges you calculated above, plot the characteristics of alanine over a range of pH
values. Connect the points by estimating what the charge should be at pH values where you
lack data. It is possible to calculate the charge at any pH, but if you understand the
relationships presented here you will be able to make estimates quickly and easily.
+2
+1.5
+1 -
+0.5-
-0.5 -
-1-
-1.5 -
7.
6.
11
13
14
pH of solution
7. Aspartic acid has a side chain bearing a carboxylic acid group; its pK, is 4. The a-amino and
a-carboxylic groups have pKa values similar to those of alanine. Determine the net charge
on aspartic acid at the following pH values:
pH 1
pH 2
pH 4
pH 9
pH 13
Net charge of molecules
2.
Transcribed Image Text:6. Using the charges you calculated above, plot the characteristics of alanine over a range of pH values. Connect the points by estimating what the charge should be at pH values where you lack data. It is possible to calculate the charge at any pH, but if you understand the relationships presented here you will be able to make estimates quickly and easily. +2 +1.5 +1 - +0.5- -0.5 - -1- -1.5 - 7. 6. 11 13 14 pH of solution 7. Aspartic acid has a side chain bearing a carboxylic acid group; its pK, is 4. The a-amino and a-carboxylic groups have pKa values similar to those of alanine. Determine the net charge on aspartic acid at the following pH values: pH 1 pH 2 pH 4 pH 9 pH 13 Net charge of molecules 2.
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