enzymes

https://doi.org/10.1351/goldbook.E02159
Macromolecules, mostly of protein nature, that function as @B00652@ by increasing the reaction rates. In general, an enzyme catalyses only one reaction type (reaction specificity) and operates on only one type of @S06083@ (substrate specificity). Substrate molecules are attacked at the same site (regiospecificity) and only one or preferentially one of the enantiomers of @C01057@ substrates or of @R05026@ mixtures is attacked (stereospecificity).
Sources:
PAC, 1992, 64, 143. (Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992)) on page 152 [Terms] [Paper]
PAC, 1993, 65, 2291. (Nomenclature of kinetic methods of analysis (IUPAC Recommendations 1993)) on page 2295 [Terms] [Paper]
PAC, 1994, 66, 2587. (Glossary of bioanalytical nomenclature - Part 1: General terminology, body fluids, enzymology, immunology (IUPAC Recommendations 1994)) on page 2593 [Terms] [Paper]