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Brewer's yeast - Brewer's yeast can mean any live yeast used in brewing. It can also mean yeast obtained as a by-product of brewing, dried and killed, and used as nutritional yeast.
Yeast extract - Yeast extract is the common name for yeast autolysates, that is, concentrations of yeast cells that are allowed to die and break up, so that the yeasts' digestive enzymes break their proteins down into simpler compounds.
Top-fermenting yeast - Top-fermenting yeast, saccharomyces cerevisiae, is one of the two types of yeast used in the brewing of beer, so called because during the fermentation process it rises to top of the fermentation vessel. Beers that use top-fermenting yeast are called ales, and for that reason these yeasts are also sometimes called "ale ...
Arming yeast - Arming yeast cells are budding yeast cells covered with proteins, the gene sequences for which have been determined. Proteins are displayed on the surface of budding yeast cells genetically as fusion proteins with the C-terminal half of α-agglutinin.
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