 Monod mentions oligomeric globular proteins again and how they appear in aggregates containing geometrically equivalent protomer subunits associated into a non-covalent steric complex.With mild treatment, protomers are separated and the oligomer protein loses function but, if the initial "normal" conditions are restored, the subunits will usually reassemble spontaneously.This spontaneity is due to the fact that the chemical potential needed to form the oligomer is present in the solution of monomers and because the bonds formed are non-covalent.