IUPAC definition : the unit of enzyme activity proposed by the international union of biochemistry in
1964. specifically, it is the amount of enzyme that catalyses the conversion of one
micromole of substrate per minute under the specified conditions of the assay method.;
Scope note : this unit is no longer recommended because the term does not indicate what physical
quantity it refers to, and because the minute is not the si unit of time.;
the unit of enzyme activity proposed by the international union of biochemistry in
1964. specifically, it is the amount of enzyme that catalyses the conversion of one
micromole of substrate per minute under the specified conditions of the assay method.