Genetics of Streptococcus thermophilus: A Review
نویسندگان
چکیده
منابع مشابه
Streptococcus thermophilus.
Streptocus tmophilus, as a species designation (Orla-Jensen, 1919), has included those members of the nonhemolytic streptococci that possess the unusual combination of characteristics of extreme salt sensitivity, nonobligate thermophily, a rigorous fermentative pattern with respect to certain sugars (Sherman, 1937), and, based upon attempts to culture on synthetic media, a notoriety for nutriti...
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ATP-dependent phosphorylation of [14C]galactose by 11 strains of Streptococcus thermophilus indicated that these organisms possessed the Leloir enzyme, galactokinase (galK). Activities were 10 times higher in fully induced, galactose-fermenting (Gal+) strains than in galactose-nonfermenting (Gal-) strains. Lactose-grown, Gal- cells released free galactose into the medium and were unable to util...
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Although Streptococcus thermophilus accumulated [14C]lactose in the absence of an endogenous energy source, galactose-fermenting (Gal+) cells were unable to accumulate [14C]galactose unless an additional energy source was added to the test system. Both Gal+ and galactose-nonfermenting (Gal-) strains transported galactose when preincubated with sucrose. Accumulation was inhibited 50 or 95% when ...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1989
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(89)79506-0