Dictionary

active site

noun

Definition of ACTIVE SITE

:  a region on the surface of an enzyme whose shape permits binding only of a specific molecular substrate that then undergoes catalysis

First Known Use of ACTIVE SITE

1957

active site

noun    (Medical Dictionary)

Medical Definition of ACTIVE SITE

:  a region especially of a biologically active protein (as an enzyme) where catalytic activity takes place and whose shape permits the binding only of a specific reactant molecule

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