Sourvisiae is a bioengineered ale yeast strain (Saccharomyces cerevisiae) capable of producing lactic acid during fermentation. Sourvisiae contains a single genetic modification, a lactate dehydrogenase gene from a food microorganism, which enables the yeast to produce high levels of lactic acid during fermentation. Beer Syles: Sour Ale - Aroma: Tangy, Sour, Slightly fruity, Attenuation: Med-High, Fermentation Range: 50-72°F (10-22°C), Alcohol Tolerance: 12% ABV, Flocculation: High