Hop resistance mechanisms in beer-spoilage LAB

2 Hop resistance mechanisms associated with cytoplasmic membrane 

In contrast to these active hop resistance mechanisms described so far, passive defense mechanisms are also important, in which energy sources are not required once they are established. In L. brevis, the membrane composition was reported to change toward the incorporation of more saturated fatty acids, such as C16 0, rendering the membrane less fluid and protecting the cell against the intruding hop bitter acids (Behr et al., 2006). This phenomenon is reminiscent of sake-spoilage Lactobacillus 

Cell vrall mcdified with lipoteichoic acids 

5 Hop resistance genes and their distribution beer-spoiiage LAB 

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