Those which produce carbon dioxide without the use of free "deamidizing" oxygen, such as zymase of yeast.
"Dietetics for Nurses" by Fairfax T. Proudfit
The optimum temperature for zymase action is 28 deg.
"The Chemistry of Plant Life" by Roscoe Wilfred Thatcher
For the alcoholic fermentation of glucose by the zymase of yeast juice two substances are also necessary.
"The Nature of Animal Light" by E. Newton Harvey
The "ferment" of yeast, called zymase, proved to be a composite of several enzymes.
"Smithsonian Institution - United States National Museum - Bulletin 240" by Anonymous