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The β-galactosidase gene was cloned from Lactobacillus bulgaricus L3 and expressed in Escherichia coli using the pET-21b vector. The recombinant enzyme was purified and applied to catalyze glycosyl transfer from lactose to sucralose, one of the most popular sweeteners. The influence of reaction parameters such as time and donor/acceptor molar ratios was investigated in detail. The dominant product...
The β-galactosidase from Enterobacter cloacae B5 was employed to synthesize novel galactose containing chemicals (GCCs) using mannitol, sorbose, and salicin as acceptors in the presence of o-nitrophenyl-β-d-galactopyranoside (oNPGal) as donor. The influences of the process parameters on GCC synthesis using mannitol as an acceptor, including effects of variations in initial substrate concentration,...
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