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Brewing yeast genomes and genome‐wide expression and proteome profiling during fermentation

The genome structure, ancestry and instability of the brewing yeast strains have received considerable attention. The hybrid nature of brewing lager yeast strains provides adaptive potential but yields genome instability which can adversely affect fermentation performance. The requirement to differentiate between production strains and assess master cultures for genomic instability has led to significant adoption of specialized molecular tool kits by the industry. Furthermore, the development of genome‐wide transcriptional and protein expression technologies has generated significant interest from brewers. The opportunity presented to explore, and the concurrent requirement to understand both, the constraints and potential of their strains to generate existing and new products during fermentation is discussed. Copyright © 2007 John Wiley & Sons, Ltd.