What does zymase mean?
Zymase is a specialized biochemical term for an enzyme complex present in yeast that enables alcoholic fermentation. During this process, the enzymes in the complex help break down fermentable sugars, producing ethanol and carbon dioxide. The word became historically important in the development of biochemistry because experiments involving zymase demonstrated that fermentation could be attributed to enzyme activity rather than to living microorganisms alone. It remains associated with traditional descriptions of yeast fermentation, including brewing and breadmaking, although modern scientific accounts often identify and discuss the individual enzymes involved. Because it is not generally used in ordinary conversation, zymase is most likely to appear in biochemical literature, histories of fermentation, or discussions of brewing. Its unusual name nevertheless makes it a memorable word: it names the biological machinery that transforms sugar into alcohol and gas.
nounAn enzyme complex found in yeast that catalyzes alcoholic fermentation, breaking down sugars into ethanol and carbon dioxide.
- The enzyme complex in yeast that catalyzes alcoholic fermentation.
"Zymase extracted from yeast helped establish that fermentation is driven by enzymes."
"The addition of zymase accelerated the conversion of glucose into ethanol and carbon dioxide."
"Zymase became an important term in the history of biochemistry as researchers investigated the chemical nature of fermentation."
The plural is uncommon; zymase is normally used in the singular or as a collective term.
"Zymases from different yeast preparations were compared in the fermentation study."
Without zymase, yeast could not ferment sugar into alcohol: the same enzyme powers a brewery and the rise of dough.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does zymase come from?
Zymase combines zyme, from Greek zymē meaning “leaven” or “fermentation,” with the biochemical suffix -ase, which denotes an enzyme. In the late nineteenth century, Eduard Buchner used the term for the enzyme complex in yeast that carries out alcoholic fermentation. Its root is shared with English words such as enzyme, zymogen, zymotic, and zymurgy.
How zymase is actually used
This is chiefly a technical or historical biochemical term rather than everyday vocabulary. In modern discussions, individual enzymes involved in fermentation are often named separately, while zymase commonly refers to the overall yeast enzyme complex.
Easily confused with zymase
A zyme is an older, general term for a substance that causes fermentation, whereas zymase specifically denotes a yeast enzyme complex responsible for alcoholic fermentation.