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Biocatalytic Approaches Using Lactulose: End Product Compared with Substrate.

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Enzymatic synthesis offers a cleaner, more efficient method for producing lactulose and its derivatives compared to chemical synthesis. This review explores enzymes for lactulose production and conversion into novel compounds with promising applications.

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Area of Science:

  • Biotechnology
  • Carbohydrate Chemistry
  • Enzymology

Background:

  • Lactulose, a lactose-based carbohydrate, possesses prebiotic properties and medical uses.
  • Current chemical synthesis of lactulose suffers from low yields and significant by-products.
  • Enzymatic synthesis presents a cleaner, milder alternative for lactulose production.

Purpose of the Study:

  • To review enzymes involved in lactulose synthesis.
  • To discuss reaction conditions, yields, and microbial sources influencing enzyme efficiency.
  • To cover the enzymatic conversion of lactulose into novel lactulose-based compounds.

Main Methods:

  • Enzymatic synthesis via glycosidase-catalyzed hydrolysis/transfer reactions.
  • Enzymatic synthesis via cellobiose-2-epimerase-catalyzed lactose isomerization.
  • Enzymatic conversion of lactulose into oligosaccharides and esters.

Main Results:

  • Enzyme type and microbial source significantly impact reaction conditions and product composition.
  • Enzymatic routes provide a cleaner production of lactulose with potentially higher yields.
  • Lactulose serves as a substrate for synthesizing valuable lactulose-based compounds.

Conclusions:

  • Enzymatic synthesis is a superior method for lactulose production.
  • Lactulose-based oligosaccharides and esters offer new functionalities and applications.
  • Further research into biocatalysts and reaction optimization is warranted.