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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Lactose-utilizing (Lac+ ) strains ofErwinia spp. from human clinical material transferlac by conjugation to plant strains ofErwinia herbicola andErwinia amylovora , to otherErwinia strains from human clinical sources, and also toEscherichia coli, Paracolobactrum arizonae, Salmonella typhimurium , andShigella dysenteriae . The frequency of this transfer varies with the donor and recipient strains employed. Thelac genes appear stable in these exconjugants, and they are not cured by acridine orange. The Lac+ exconjugants transferlac to anEscherichia coli F− Lac− strain; the frequency of this transfer is high withE. herbicola andS. typhimurium exconjugants and relatively low with other exconjugants. The most studiedErwinia donor strain from human clinical material (EH133) and its Lac+ exconjugants are insensitive to the F-specific phage, M13. P1-mediated transduction oflac , by using a Lac+ exconjugant ofE. coli as the donor and anE. coli F− Lac− strain as the recipient, revealed that all 50 Lac+ transduced clones tested also inherited donor ability, suggesting a close linkage between theErwinia sex factor (designated as E) and thelac genes. TheE. coli culture harboring E-lac (E and thelac genes linked to it) does not restrict phages T1, T7, and λvir . E-lac is compatible with F'his , R100drd -56 (F-like), and R64drd -11 (I-like); cells harboring F'his or one of the R factors do not show super-infection immunity to the incoming E-lac , and E-lac plus one of the other plasmids can coexist stably in the same cell. The fertility of cells harboring F'his or R100drd -56—as determined by the frequency of conjugal transfer ofhis or of the resistance determinant (Tetr in case of R100drd -56) and also by sensitivity to F-specific phage (M13)—is not altered by the presence of E-lac , and this suggests that the sex factor E might belong to thefi − class.

Transmission of lac by the Sex Factor E in Erwinia Strains from Human Clinical Sources