Enzymes like bacterial malonyl CoA-acly carrier protein transacylase (<db_xref db="EC" dbkey="2.3.1.39"/>) and eukaryotic fatty acid synthase (<db_xref db="EC" dbkey="2.3.1.85"/>) that are involved in fatty acidbiosynthesis belong to this group. Also included are the polyketide synthases 6-methylsalicylic acid synthase (<db_xref db="EC" dbkey="2.3.1"/>), a multifunctional enzyme that involvedin the biosynthesis of patulin and conidial green pigment synthase (<db_xref db="EC" dbkey="2.3.1"/>).