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The effect of temperature and pH on the proteolytic activity of lactic acid bacteria was studied. Lactobacilli and thermophilic streptococci showed highest proteolysis at 15 and 45C, and mesophilic streptococci exhibited only slight activity at all temperatures used. Variations in pH also had a strong influence on casein hydrolysis; this effect was more evident in streptococci than in lactobacilli.
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Giori et al. (1985) studied this question.
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