Question

What dipeptides would be formed by heating a mixture of valine and N- protected leucine?

Short answer

The answer is:

Leu-Val

Val-Val

Step-by-step solution

Step-by-Step Solution Step 1: Dipeptides

The dipeptides are peptides comprised of two amino acids. The peptides are the amino acid chains interconnected by the peptide bond. The RCONHR’ bond is called the peptide bond. The peptides composed of two, three, four, and five amino acids are dipeptide, tripeptide, tetrapeptide, and pentapeptide, respectively.

Explanations

The Leu-Val and Val-Val are formed. This is because the amino group of leucine is protected, so leucine cannot react with the carboxyl group, and hence leucine cannot be a C-terminal amino acid. The amino group of valine can react equally with the carboxyl group of other molecules and with that of leucine.

The dipeptides formed are given below.

Leu-Val

Val-Val