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active site

Syllabification: ac·tive site

Definition of active site in English:

noun

Biochemistry
A region on an enzyme that binds to a protein or other substance during a reaction.
Example sentences
  • We propose that calcium ions set the machine in motion by initiating the contraction of the actin-myosin that they bind at active sites on the proteins.
  • The second step involves binding of phospholipid molecules in the active site of the adsorbed enzyme.
  • Extremes of pH or temperature irreversibly abolish enzyme activity, and so also do some substances that bind to the active sites of particular enzymes.

Definition of active site in:

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