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Some properties of ß-galactosidase produced from bifidobacterium bifidum and its use in milk lactose hydrolysis [electronic resource].

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Shady, T. S. M

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Language: English Summary language: Arabic Description: p.941-955Other title:

بعض خواص إنزيم البيتاجالاكتوسيديز المنتج من البافيدوباكتريم بافيديم وإستخدامه فى تحليل سكر اللبن.‪ [Added title page title]

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Zagazig journal of agricultural research, 2004 v. 31 (3) [electronic resource].

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In: Zagazig Journal of Agricultural Research 2004.v.31(3)Summary: Bifidobacteria, which have beneficial health effects, are known to have relatively high levels of /3-galactosidase. Therefore, these results revealed that:' enzyme productivity reached its maximum after 48 hours of incubation. 37°C and pH 4.5 were found as the best environmental conditions for enzyme biosynthesis. 5% lactose in the production media induced the highest synthesis of enzyme. 30°C was found as the optimum tempenture for enzyme activity. The enzyme kept all activity up to 40°C and lost only 15% from its maximum activity at SO°c. Residual enzyme activity declined sharply when the enzyme was kept above sooC, indicating that this enzyme isn't thermostable one. pH 5.0 was found as optimum for enzyme activity.

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Bifidobacteria, which have beneficial health effects, are known to have relatively high levels of /3-galactosidase. Therefore, these results revealed that:' enzyme productivity reached its maximum after 48 hours of incubation. 37°C and pH 4.5 were found as the best environmental conditions for enzyme biosynthesis. 5% lactose in the production media induced the highest synthesis of enzyme. 30°C was found as the optimum tempenture for enzyme activity. The enzyme kept all activity up to 40°C and lost only 15% from its maximum activity at SO°c. Residual enzyme activity declined sharply when the enzyme was kept above sooC, indicating that this enzyme isn't thermostable one. pH 5.0 was found as optimum for enzyme activity.

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