Liha töötlemine
nreABC genes, were identified and shown to development of volatile compounds, depend-
link the nitrate reductase operon (narGHJI) ing on whether S. xylosus or S. carnosus were
and the putative nitrate transporter gene used as starter culture.
narT. The data provide evidence for a global Even though microbial proteolytic activity
regulatory system, with oxygen as the effec- is generally low in the conditions found in
tors molecule (Fedtke et al. 2002). The high fermented sausages (Kenneally et al. 1999),
dissimilatory nitrate respiration, typical of S. a minor, strain-dependent activity may still
carnosus and involved in nitrate reduction in partly contribute to initial protein breakdown
meat products, was found to be present in the (Molly et al. 1997; Fadda et al. 1999a, b,
genome of S. carnosus TM300 (Rosenstein 2002; Sanz et al. 1999). Several studies lead
et al. 2009)
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