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. 1979 Jan;137(1):51–61. doi: 10.1128/jb.137.1.51-61.1979

Purification and properties of an inducible beta-galactosidase isolated from the yeast Kluyveromyces lactis.

R C Dickson, L R Dickson, J S Markin
PMCID: PMC218417  PMID: 33153

Abstract

beta-Galactosidase (EC 3.2.1.32) was purified 80-fold from the yeast Kluyveromyces lactis induced for this enzyme by growth on lactose. When the purified enzyme was subjected to electrophoresis on an acrylamide gel in the presence of sodium dodecyl sulfate, one protein with an apparent molecular weight of 135,000 was observed. The enzyme has a sedimentation coefficient of 9.6S. This beta-galactosidase and the one from Escherichia coli are not antigenically related. Maximal enzyme activity requires Na+ and Mn2+ and a reducing agent. beta-Galactosidase has Km values of 12 to 17 and 1.6 mM for lactose and o-nitrophenyl-beta-D-galactoside, respectively. The hydrolase and transgalactosylase activities of the enzyme are similar to those of E. coli beta-galactosidase.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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