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Proprietary yeast is yeast that has been manufactured specifically for a brewery, or has been originated by the brewery itself.

A significant amount of flavor is produced directly from the yeast's fermentation activities, and having a strain of yeast unique to a brewery gives it the advantage of distinguishing its beers from competitors using similar formulas and yeast strains easily available to anyone.

An example of a proprietary yeast is by the Rogue Ales Brewery in Newport, Oregon. They brew a German Maibock style ale named Rogue Dead Guy Ale using their proprietary Pacman yeast.

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15y ago

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