Today in 2011, US Patent 2290089 A2 was issued, an invention of Søren Knudsen, Lene Mølskov Bech, Klaus Breddam, Finn Lok, Ole Olsen, and Birgitte Skadhauge, assigned to Carlsberg A/S, for their “Barley for Production of Flavor-Stable Beverage.” Here’s the Abstract:
According to the invention, there is provided null-LOX-1 barley and plant products produced thereof, such as malt manufactured by using barley kernels defective in synthesis of the fatty acid-converting enzyme lipoxygenase-1. Said enzyme accounts for the principal activity related to conversion of linoleic acid into 9-hydroperoxy octadecadienoic acid, a lipoxygenase pathway metabolite, which – through further enzymatic or spontaneous reactions – may lead to the appearance of trans-2-nonenal. The invention enables brewers to produce a beer devoid of detectable trans-2-nonenal-specific off-flavors, even after prolonged storage of the beverage.
