Units of catalytic-activity (Enzyme Activity)
Definition | Amount of enzyme that catalyses the transformation of certain moles of substrate per time unit under standard conditions (ref. 1) |
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Scope | Two corresponding units to catalytic-activity (enzyme activity) exist |
Recommendation | Katal is the recommended unit for catalytic-activity kind-of-quantity (ref. 2) |
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Symbol | Kat |
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Definition |
The amount of enzyme that catalyses the transformation of one mole of substrate per second under standard conditions kat=mol/s |
Recommendation | Recommended unit for use of catalytic-activity kind-of-quantity |
Reference |
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Symbol | U |
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Definition |
The amount of enzyme that catalyses the transformation of one micromol of substrate per minute under standard conditions U=µmol/min |
Scope | Unit for use of catalytic-activity kind-of-quantity |
Caution | Due to the symbol, U, the symbol can be mistaken by International Unit (IU) that is a non-SI unit |
Non-recommended term | International Unit (IU) |
Reference |
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