[Systems of surface exclusion of F-like plasmids of E. coli and their genetic control]. / Sistemy poverkhnostnogo iskliucheniia F-podobnykh plazmid E. coli i ikh geneticheskii kontrol'.

The F-like plasmids belonging to 5 different Sfx-groups were discovered. The existence of atypical plasmids belonging to different Sfx-groups was shown. The molecular cloning of plasmid DNA fragment (3.9 mD) determining SfxII phenotype was performed.

[Formation of cointegrates during mobilization of nonconjugated plasmids to genetic transfer by plasmid pAP42]. / Formirovanie kointegratov pri mobilizatsii plazmidoi pAP42 nekon"iugativnykh plazmid na geneticheskii perenos.

pAP42 plasmid mobilizes nonconjugative pMR5, pBR322, pACYC 184, RSF2124, RSF1010 plasmids with different frequency. During mobilization of nonconjugative RSF2124 and pACYC184 plasmids by pAP42 factor there form cointegrative structures similar in their properties to typical R plasmids.