Transferases are enzymes that transfer a group (eg a methyl or
glycosyl group) from one compound (which is generally regarded as the
donor) to another compound (generally regarded as the
The E.C. classification for these enzymes classifies them firstly by the
donor group, then by the acceptor, and lastly by the
The recommended names are normally formed as: acceptor-group
transferase, or donor-group transferase. in many cases the
donor is a cofactor (coenzyme) charged with the group to be transferred.