Catalytic Activity Converter
How to Use the Catalytic Activity Converter
This converter changes catalytic activity between katal, millikatal, microkatal, enzyme units (U) and micromoles per minute. Enter the known value, choose its unit, select the target unit, and convert.
Practical Example
An enzyme activity of 60 U corresponds to 60 µmol/min and approximately 1 µkat. This is useful when comparing laboratory protocols, enzyme specifications and SI-based calculations.
Factors That Affect the Result
The unit conversion is fixed, but measured enzyme activity can depend strongly on temperature, pH, substrate concentration and assay conditions. Always compare activities measured under equivalent experimental conditions.
Frequently Asked Questions
Is the katal an SI unit?
Yes. The katal is the SI derived unit for catalytic activity.
Is one enzyme unit equal to one micromole per minute?
Yes. One U is conventionally defined as one micromole of substrate converted per minute under specified conditions.
Why can enzyme activity change between experiments?
Temperature, pH, substrate availability and assay design can all affect measured catalytic activity.
Technical Context and Conversion Notes
Catalytic activity measures the rate at which a catalyst converts substrate. One katal equals one mole per second; the enzyme unit U is commonly one micromole per minute, so the conversion includes both amount and time factors.