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A study of commercial β-galactosidase stability under simulated in vitro gastric conditions

dc.contributor.authorŽolnere, K.
dc.contributor.authorCiproviča, I.
dc.contributor.authorĶirse, A.
dc.contributor.authorCinkmanis, I.
dc.date.accessioned2018-04-18T08:09:09Z
dc.date.available2018-04-18T08:09:09Z
dc.date.issued2018
dc.descriptionArticleeng
dc.description.abstractβ-Galactosidase activity in milk may be affected by several factors, such as temperature, pH, milk composition, and metal ions. It is important to note that digestive proteases and gastrointestinal pH can affect enzyme activity during transit through the gastrointestinal tract. For the investigation of commercial β - galactosidase stability in human and animal gastric tracts, human gastrointestinal tract (GIT) models were employed, enabling prediction of enzyme activity under in vivo conditions. The aim of this study was to analyse and compare commercial β - galactosidase stability under simulated in vitro gastric conditions. Commercial enzymes (Ha Lactase 5200 produced by Kluyveromyces lactis and NOLA™Fit5500 produced by Bifidobacterium bifidum expressed in Bacillus lichenifo rmis , Chr. Hansen, Hørsholm, Denmark; GODO - YNL2 produced by Kluyveromyces lactis , Danisco, Copenhagen, Denmark) were used for this study. Commercial enzymes were added to GIT models at 1 and 5 mL L – 1 . The enzyme activity was assessed as the percentage of l actose hydrolysis by the enzymes from Kluyveromyces lactis and Bacillus licheniformis using HPLC after digestion. β - Galactosidase extracted from yeast ( Kluyveromyces lactis ) and bacteria ( Bacillus licheniformis ) was found to be effective as a strategy for improving lactose tolerance.eng
dc.identifier.issn1406-894X
dc.identifier.publicationAgronomy Research, 2018, vol. 16, Special Issue 2, pp. 1555-1562eng
dc.identifier.urihttp://hdl.handle.net/10492/3895
dc.identifier.urihttp://dx.doi.org/10.15159/ar.18.075
dc.rights.holderCopyright 2009 by Estonian University of Life Sciences, Latvia University of Agriculture, Aleksandras Stulginskis University, Lithuanian Research Centre for Agriculture and Forestry. No part of this publication may be reproduced or transmitted in any form, or by any means, electronic or mechanical, incl. photocopying, electronic recording, or otherwise without the prior written permission from the Estonian University of Life Sciences, Latvia University of Agriculture, Aleksandras Stulginskis University, Lithuanian Research Centre for Agriculture and Forestryeng
dc.subjectβ-galactosidaseeng
dc.subjectsimulated gastric conditionseng
dc.subjectlactose hydrolysiseng
dc.subjectarticleseng
dc.titleA study of commercial β-galactosidase stability under simulated in vitro gastric conditionseng
dc.typeArticleeng

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