Page 70 - Medicinal Plants_PharmD general

considerable importance in the drying of drugs. The optimum working
temperatures of different enzyme vary, but usually lie between 35 – 50oC.

3- pH value

For every enzyme, there is a pH value at which the enzyme is most
efficient as catalyst.

4- Substrate concentration

- If the substrate concentration is low, the chance that the molecules
react with the active site of the enzyme is fewer.

- By increasing the substrate concentration, the time to fill the empty
active sites become shorter and the speed of the reaction increases.

- At very high substrate concentration, the active sites of all the
enzymes molecules are saturated with substrate and the velocity
reaches maximum and remains constant.

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