English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Klebsiella sp. strain CT-200 lacks both its plasmid-borne lac operon, which specifies beta-galactosidase I, and its chromosomal lac operon, which specifies beta-galactosidase II, but it expresses a gene for a third beta-galactosidase, beta-galactosidase III, constitutively. CT-200 was examined to determine whether there was a beta-galactoside permease associated with the beta-galactosidase III gene. The failure of CT-200 to transport thiomethyl-beta-galactoside, o-nitrophenyl-beta-D-galactopyranoside, phenyl-beta-galactoside, lactulose, or galactosyl-arabinose was taken as evidence that beta-galactoside permease is not part of a beta-galactosidase III operon. Optimal assay conditions for beta-galactosidase II, whose activity was used as a measure of beta-galactoside transport, are reported here, as are an improved purification method and some physical and catalytic properties of the enzyme not previously reported.

Properties of beta-galactosidase III: implications for entry of galactosides into Klebsiella