2- What are the net charges of the following AA’s at the pH-Values of (1, 5, 7, and 11.0)? Show the structures on the back. @ pH 1 @ pH 5 @ pH 7 @ pH 11 _____________________________________________________________________ Aspartic acid ____________________________________________________________________ Alanine ____________________________________________________________________ Lysine ____________________________________________________________________
2- What are the net charges of the following AA’s at the pH-Values of (1, 5, 7, and 11.0)? Show the structures on the back.
@ pH 1 @ pH 5 @ pH 7 @ pH 11
_____________________________________________________________________
Aspartic acid
____________________________________________________________________
Alanine
____________________________________________________________________
Lysine
____________________________________________________________________
The net charge on the amino acid depends on the pH given and the pKa of the -COOH group, -NH2 group and side chain of the amino acids.
If pKa value of a group is more than pH, it will be protonated
If it is less than pH, it will be deprotonated
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