BARLEY WITH REDUCED LIPOXYGENASE ACTIVITY
    2.
    发明申请
    BARLEY WITH REDUCED LIPOXYGENASE ACTIVITY 审中-公开
    BARLEY与减少LIPOXYGENASE活动

    公开(公告)号:WO2010075860A2

    公开(公告)日:2010-07-08

    申请号:PCT/DK2009/050355

    申请日:2009-12-28

    CPC classification number: A01H5/10 C12C1/18 C12C12/00 C12C2200/01

    Abstract: According to the invention, there is provided barley with total loss of functional lipoxygenase (LOX)-1 and LOX-2 enzymes, and plant products produced thereof, such as malt manufactured by using barley kernels defective in the synthesis of the fatty acid-dioxygenating enzymes LOX-1 and LOX-2. Said enzymes account for the principal activities related to dioxygenation of linoleic acid into 9- and 13-hydroperoxy octadecadienoic acid,respectively. 9-Hydroperoxy octadecadienoic acid represents a LOX pathway metabolite, which - through further enzymatic or spontaneous reactions - may lead to the appearance of trans-2-nonenal (T2N). The invention enables brewers to produce a beer having insignificant levels of stale,T2N-specific off-flavors, even after prolonged storage of the beverage.

    Abstract translation: 根据本发明,提供了具有功能性脂氧合酶(LOX)-1和LOX-2酶的总损失的大麦及其生产的植物产品,例如通过使用在合成脂肪酸 - 双氧合中缺陷的大麦仁制备的麦芽 酶LOX-1和LOX-2。 所述酶分别涉及与亚油酸双加氧相关的9-和13-氢过氧十八碳二烯酸的主要活性。 9-氢过氧十八碳二烯酸代表LOX途径代谢物,其通过进一步的酶促或自发反应可能导致反式-2-壬醛(T2N)的出现。 本发明使酿造商能够生产具有不明显水平的陈年T2N特异性异味的啤酒,即使在饮料长期储存之后。

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