Enzymes
(In progress)
An enzyme is a protein that facilitates a chemical reaction. Enzymes play an important role in every fermented beverage.
For beer production, grain is "malted" in order to increase the amount of enzymes. The most important enzymes in brewing include α- and β-amylase, proteases, peptidases, β- (1,3)(1,4)-glucanases and lipases.[1] The most important action of these enzymes is that during the mash they convert the starches in the grain into fermentable sugars. Brewers may sometimes add extra enzymes such as glucoamylase in order to further break down the complex sugars (dextrins). Hops also have enzymes that can break down dextrins.
In wine production, pectinase is commonly added to improve clarity and extraction.
Microbes use a large variety of enzymes in order to grow, survive, and conduct fermentation. (See Fermentation.)
Some enzymes can have a negative impact (such as polyphenol oxidase in fruit) and we take steps to inhibit them.
The action of enzymes is influenced by pH, temperature, and other factors. High temperatures will permanently disable enzymes because the protein structure becomes irreversibly distorted, preventing them from functioning.
- https://www.researchgate.net/profile/David_Evan_Evans/publication/230559002_Assessing_the_impact_of_the_level_of_diastatic_power_enzymes_and_their_thermostability_on_the_hydrolysis_of_starch_during_wort_production_to_predict_malt_fermentability/links/5789973608ae5c86c99ae90f.pdf
- https://www.researchgate.net/profile/David_Evan_Evans/publication/226691242_The_Properties_and_Genetics_of_Barley_Malt_Starch_Degrading_Enzymes/links/578f1cf408ae81b4466ed501/The-Properties-and-Genetics-of-Barley-Malt-Starch-Degrading-Enzymes.pdf
References
- ↑ Szwajgier, D. "Dry and Wet Milling of Malt. A Preliminary Study Comparing Fermentable Sugar, Total Protein, Total Phenolics and the Ferulic Acid Content in Non-Hopped Worts." J. Inst. Brew. vol. 117, no. 4, 2011, pp. 569–577.