The dissociable, low-relative-molecular-mass active group of an @E02159@ which transfers chemical groups, hydrogen or electrons. A coenzyme binds with its associated protein (@A00417@) to form the active enzyme (@H02836@).
PAC, 1994, 66, 2587. (Glossary of bioanalytical nomenclature - Part 1: General terminology, body fluids, enzymology, immunology (IUPAC Recommendations 1994)) on page 2593 [Terms] [Paper]
See also:
PAC, 1992, 64, 143. (Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992)) on page 150 [Terms] [Paper]