Wine Protein Haze: Mechanisms of Formation and Advances in Prevention

2015/04/07 by Steven C. Van Sluyter, Jacqui M. McRae, Robert J. Falconer +4 · 25 citations
Agricultural and Biological Sciences · #Fermentation and Sensory Analysis #Horticultural and Viticultural Research #Meat and Animal Product Quality

paper · doi:10.1021/acs.jafc.5b00047

Abstract

Protein haze is an aesthetic problem in white wines that can be prevented by removing the grape proteins that have survived the winemaking process. The haze-forming proteins are grape pathogenesis-related proteins that are highly stable during winemaking, but some of them precipitate over time and with elevated temperatures. Protein removal is currently achieved by bentonite addition, an inefficient process that can lead to higher costs and quality losses in winemaking. The development of more efficient processes for protein removal and haze prevention requires understanding the mechanisms such as the main drivers of protein instability and the impacts of various wine matrix components on haze formation. This review covers recent developments in wine protein instability and removal and proposes a revised mechanism of protein haze formation.

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