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An immobilized two-enzyme system for the activation of the lactoperoxidase antibacterial system in milk

✍ Scribed by L. Björck; C-G. Rosén

Publisher
John Wiley and Sons
Year
1976
Tongue
English
Weight
440 KB
Volume
18
Category
Article
ISSN
0006-3592

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✦ Synopsis

Abstract

Lactoperoxidase catalyzes the oxidation of thiocyanate by hydrogen peroxide and an intermediary product is formed with antibacterial properties. The components of this system, with the exception of hydrogen peroxide, are present in milk. H~2~O~2~ may be introduced by means of enzymatic, generation and thus make the system complete. A two‐enzyme system consisting of β–galactosidase and glucose oxidase has been developed for this purpose. The coupled enzyme reaction is shown to work with high efficiency at the neutral pH of milk although the enzymes as such, particularly lactases suitable for immobilization, have optimal activities at much lower pH values. The results indicate that the lactoperoxidase system may in this way be employed to inactivate bacteria present in milk.

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