lyases

https://doi.org/10.1351/goldbook.L03652
@E02159@ cleaving C–C, C–O, C–N and other bonds by other reactions than by @H02902@ or @O04362@. Lyases catalyse the addition of molecules to unsaturated compounds or the @E02038@ 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 [Terms] [Paper]