Substances that plug up an enzyme active site and prevent the reaction from occurring are enzyme inhibitor
Enzyme inhibitors are molecules that temporarily or permanently interact with enzymes in some way, reducing the rate of an enzyme-catalyzed reaction or preventing enzymes from functioning normally. Competitive, noncompetitive, and uncompetitive inhibitors are the three main categories of inhibitors.
Enzyme inhibitors are substances that alter the enzyme's catalytic capabilities. As a result, they reduce the enzyme's ability to catalyze reactions or, in extreme cases, completely stop them. These enzyme inhibitors function by obstructing or changing the active site.
It is possible to define enzyme inhibitors as substances that attach to enzymes and reduce their activity. They attach to the enzymes' active sites and reduce the enzymes' compatibility with substrates, which prevents the formation of enzyme-substrate complexes.
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