Sourvisiae (LallemandBrewing)

Sourvisiae® is a bioengineered ale yeast strain (Saccharomyces cerevisiae) capable of producing
lactic acid during fermentation to provide brewers with an easy, reproducible, and mono-culture
product for sour-style beer production.

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, the main compound that gives sour beers their flavor.