Question

Which amino acids have side chains that are capable of forming Isopeptide bonds?

Short answer

The amino acids Lysine, Aspartic acid, and Glutamic acid are capable of forming Isopeptide bonds.

Step-by-step solution

What is an Isopeptide bond?

An isopeptide bond is formed between the side chain amino group of one amino acid with the side-chain carboxyl group of another amino acid. These are also known as eupeptide bonds.

List of Amino acids capable of forming Isopeptide bond

The following amino acids can form isopeptide bonds.

(a) Lysine- amino group of side chain

(b) Aspartic acid and Glutamic acid- carboxyl group of side chain

Thus, the amino acids Lysine, Aspartic acid, and Glutamic acid have side chains capable of forming isopeptide bonds.