Nonenzymatic

Part of speech: adjective

Definitions

1. Describing a process or reaction that occurs without the involvement of enzymes ; relating to biochemical events that proceed independently of enzymatic catalysis ; indicating mechanisms that do not require enzyme participation for their occurrence
2. Pertaining to chemical or biological actions carried out in the absence of enzymes ; involving pathways or modifications that happen without enzymatic aid ; characterizing reactions that proceed solely through non-enzymatic means
3. Referring to transformations or effects in biological systems that do not depend on enzyme activity ; describing phenomena occurring without enzymatic influence ; denoting processes that are catalyzed in a non-enzymatic manner

Etymology: The prefix here carries most of the story. "Non-" is a Latin negating element, inherited in English from Old English "nān" ("not one"), which is why it has a more homely ancestry than its classical look suggests. The real history is in the middle term. "Enzyme" was coined in 1876 by the German physiologist Wilhelm Kühne, who borrowed it from the Greek "en" ("in") and "zyme" ("leaven"), describing substances that work inside yeast. Kühne's coinage was a deliberate name for a process people could observe but not explain: yeast fermenting sugar even when the cells were broken open. "Enzymatic" follows the usual pattern for adjectives built on Greek-derived nouns: the noun "enzyme" takes the adjectival suffix "-atic", which English adopted through Latin "-aticus" and French "-atique" and which is itself the same suffix found in words such as "dramatic" and "systematic". Adding "non-" then yields a word meaning simply "not involving enzymes," and it is most often used in biochemistry to contrast a reaction that a cell's catalysts speed up with one that proceeds on its own.

Synonyms: noncatalytic, enzyme-free, nonenzymed, nonenzymic

Antonyms: enzymatic, catalytic, enzyme-driven