TL;DR: C curing experiments and molecular characterization of the extrachromosomal DNA clearly demonstrate the existence of two plasmids, plP401 and plP402, which, respectively, code for Tc Cm and Em Cl resistance, which are transferable to sensitive strains of C. perfringens.

TL;DR: Analysis of EcoR1-cleaved replicating molecules of pSM1 and pSM3, which carry common sequences completely or partly homologous to pSM2, provides further evidence for the unidirectional replication of these plasmids from a common origin.

TL;DR: It is concluded that the pI258 ermB locus is a component of a translocatable element, and the chromosomal location of the Ps53 bla locus has been established, suggesting that this gene can also translocate.

TL;DR: The relative positions of the sites on RP1 of the following restriction enzymes were mapped: EcoRl, BamH1, HindIII, BglII, SmaI, and PstI.

TL;DR: One of the donor strains transferring a gene that corrected thermosensitive cell cleavage in the fts I − mutant overproduced the penicillin-binding protein 3 by ca.

TL;DR: The sum of the molecular sizes of these fragments, estimated from their mobility relative to that of known markers, accounts for the total length of HeLa cell mtDNA.

TL;DR: Pseudomonas plasmid pMG7 interferes with the propagation of bacteriophages B3, D3, F116, and G101 by determining a restriction and modification system.

TL;DR: In crosses between Escherichia coli donors bearing conjugative plasmids and recipients carrying mutant rho alleles, the yield of transconjugants was almost always depressed in comparison with the isogenic rho+ strain, suggesting that the combination of this plasmid with a chromosomal rho mutation adversely affects colony forming ability.

TL;DR: A majority of wild-type, conjugative antibiotic-resistance plasmids from a standard collection had the ability to suppress or to enhance the temperature sensitivity of dnaB mutants of Escherichia coli K12.

TL;DR: The mitochondrial DNA from several species of Paramecium aurelia was characterized by its buoyant density, contour length, and cleavage pattern with the restriction endonucleases Eco RI and Hae II and the uniqueness of each fragmentation pattern was used to identify the mitochondrial DNA in interspecies hybrids.