Question- assume that the pkas of the carboxyl amino and, Ask an Expert

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Question- Assume that the pKas of the carboxyl, amino, and side chain protons are the same in the tripeptide( N-terminus aspartic acid, lysine, and valine C-terminus) as they are in the free amino acid species. Starting with the fully protonated tripeptide, determine the magnitude and the sign of the overall charge on tripeptide at

1. pH = 2.0

2. pH = 7.0

3. pH = 12.0

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