[en-zahym] /ˈɛn zaɪm/

noun, Biochemistry.
any of various proteins, as pepsin, originating from living cells and capable of producing certain chemical changes in organic substances by catalytic action, as in digestion.
any of a group of complex proteins or conjugated proteins that are produced by living cells and act as catalysts in specific biochemical reactions

1881, as a biochemical term, from German Enzym, coined 1878 by German physiologist Wilhelm Kühne (1837-1900), from Modern Greek enzymos “leavened,” from en “in” (see en- (2)) + zyme “leaven” (see zymurgy).

enzyme en·zyme (ěn’zīm)
Any of numerous proteins or conjugated proteins produced by living organisms and functioning as specialized catalysts for biochemical reactions.
en’zy·mat’ic (-zə-māt’ĭk) adj.

Any of numerous proteins produced in living cells that accelerate or catalyze the metabolic processes of an organism. Enzymes are usually very selective in the molecules that they act upon, called substrates, often reacting with only a single substrate. The substrate binds to the enzyme at a location called the active site just before the reaction catalyzed by the enzyme takes place. Enzymes can speed up chemical reactions by up to a millionfold, but only function within a narrow temperature and pH range, outside of which they can lose their structure and become denatured. Enzymes are involved in such processes as the breaking down of the large protein, starch, and fat molecules in food into smaller molecules during digestion, the joining together of nucleotides into strands of DNA, and the addition of a phosphate group to ADP to form ATP. The names of enzymes usually end in the suffix -ase.
enzyme [(en-zeyem)]

A protein molecule that helps other organic molecules enter into chemical reactions with one another but is itself unaffected by these reactions. In other words, enzymes act as catalysts for organic biochemical reactions.


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  • Enzymolysis

    [en-zahy-mol-uh-sis, -zi-] /ˌɛn zaɪˈmɒl ə sɪs, -zɪ-/ noun, Biochemistry. 1. the decomposition of a chemical compound catalyzed by the presence of an . /ˌɛnzaɪˈmɒlɪsɪs/ noun 1. a biochemical decomposition, such as a fermentation, that is catalysed by an enzyme enzymolysis en·zy·mol·y·sis (ěn’zə-mŏl’ĭ-sĭs) n. Chemical change or cleavage of a substance by enzymatic action.

  • Enzymology

    [en-zahy-mol-uh-jee, -zi-] /ˌɛn zaɪˈmɒl ə dʒi, -zɪ-/ noun 1. the branch of biology that deals with the chemistry, biochemistry, and effects of . /ˌɛnzaɪˈmɒlədʒɪ/ noun 1. the branch of science concerned with the study of enzymes enzymology en·zy·mol·o·gy (ěn’zə-mŏl’ə-jē) n. The branch of science that deals with the biochemical nature and activity of enzymes.

  • Enzymopathy

    enzymopathy en·zy·mop·a·thy (ěn’zə-mŏp’ə-thē) n. Any of various disturbances of enzyme function, such as the genetic deficiency of a specific enzyme.

  • EO

    1. executive order. 1. a combining form meaning “early,” “primeval,” used in the formation of compound words: Eocene; eohippus. 1. ex officio. [ey-oh ip-soh; English ee-oh ip-soh] /ˈeɪ oʊ ˈɪp soʊ; English ˈi oʊ ˈɪp soʊ/ adverb, Latin. 1. by that very fact. [ey-oh noh-mi-ne; English ee-oh nom-i-nee] /ˈeɪ oʊ ˈnoʊ mɪˌnɛ; English ˈi oʊ […]

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