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Except for some of the originally studied enzymes such as pepsin, rennin, and trypsin, most enzyme names end in ase. The International Union of Biochemistry (I.U.B.) initiated standards of enzyme nomenclature which recommend that enzyme names indicate both the substrate acted upon and the type of reaction catalyzed.xcept for some of the originally studied enzymes such as pepsin, rennin, and trypsin, most enzyme names end in ase. The International Union of Biochemistry (I.U.B.) initiated standards of enzyme nomenclature which recommend that enzyme names indicate both the substrate acted upon and the type of reaction catalyzed.
1 Reaction specific enzymes, these enzymes as the name suggests reacts to specific reactions only. 2  Group specific enzymes are those that catalyze a group of substances that contain specific substances. 3  The enzyme activity can be controlled but the activity of the catalysts can not be controlled. 4  All enzymes are proteins.