enzymes that catalyse reactions in which a group is transferred from one compound to another. Groups that are transferred are
C, aldehydic or ketonic residues, acyl, glycosyl, alkyl, nitrogenous, phosphorus and sulfur containing groups.
Source:
PAC, 1992, 64, 143. 'Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992)' on page 167 (https://doi.org/10.1351/pac199264010143)