Enzymes cleaving
C–C,
C–O,
C–N
and other bonds by other reactions than by
hydrolysis or
oxidation. Lyases catalyse the addition of molecules to unsaturated compounds or the
elimination of molecules creating an unsaturated residue.
Source:
PAC, 1992, 64, 143
(Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992))
on page 159