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suicide substrate

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia, Hutchinson 0.02 sec.
suicide substrate
a compound that is not of itself toxic to a cell, but which resembles a normal metabolite closely enough that it undergoes metabolic transformation to a product that does inhibit a crucial enzyme, e.g. fluoroacetate. A substrate-analog that binds irreversibly to amino acids, usually the catalytic amino acid, thereby blocking the active site of the enzyme to other molecules and effectively 'killing' the enzyme.


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