Interpretation:
Whether dipeptide lysine-valine is the same compound as the dipeptide valine-lysine should be determined.
Concept introduction:
Proteins are
They polymerise by peptide linkage to form dipeptide, oligopeptide and polypeptide molecules. Each peptide bond formation is a condensation reaction that occurs with the elimination of water molecule.
Explanation of Solution
Dipeptide Lysine-Valine:
The above dipeptide is formed by the reaction between lysine and valine.
The structure of Lysine is:
The structure of Valine is:
The reaction is written as:
Dipeptide Valine-Lysine:
The reaction is written as:
According to the above reactions, one can say that the dipeptide Lysine-Valine and dipeptide Valine-Lysine are not same compounds. The structures of both compounds are different as each amino acid has a different group linked to the peptide bond.
Chapter 23 Solutions
Glencoe Chemistry: Matter and Change, Student Edition
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