Biology · Transport

Disulphide bonds can be used to hold different sub-units of protein complexes together, as is found in antibodies between the light chains and between the heavy chains.

The two identical light chains and two identical heavy chains in an antibody molecule are linked by covalent disulfide bridges between cysteine residues.

Peptide bonds are covalent bonds formed between the amino group of one amino acid and the carboxyl group of another amino acid. Peptide bonds are responsible for linking amino acids together to form proteins. However, in antibodies, the heavy chains and light chains are not linked by peptide bonds.

Glycerol is a molecule that is part of triglycerides and phospholipids. It is not involved in linking the heavy and light chains of antibodies.

Ionic bonds are formed by the electrostatic attraction between positively and negatively charged ions. Antibodies do not have ionic bonds between their heavy and light chains.