Molecular piracy is a biological phenomenon in which one replicon (the pirate) uses the
structural proteins encoded by another replicon (the helper) to package its own genome and …

Temperate coliphage P2 and satellite phage P4 have icosahedral capsids and contractile
tails with side tail fibers. Because P4 requires all the capsid, tail, and lysis genes (late …

Alignments of 105 site-specific recombinases belonging to the Int family of proteins identified
extended areas of similarity and three types of structural differences. In addition to the …

Two temperate viruses, φ3626 and φ8533, have been isolated from lysogenic Clostridium
perfringens strains. Phage φ3626 was chosen for detailed analysis and was inspected by …

CI represses cro; Cro represses cI. This double negative feedback loop is the core of the
classical CI–Cro epigenetic switch of bacteriophage λ. Despite the classical status of this …

High levels of covalent integrase-DNA complexes accumulate when suicide substrates
containing a medial nick within the overlap region are nicked by lambda integrase protein …

Viruses play crucial roles in the ecosystem by modulating the host community structure,
mediating biogeochemical cycles, and compensating for the metabolism of host cells …

Streptomyces ambofaciens ATCC23877 and derivatives contain the 11‐kb element pSAM2
present in an integrated state or as a free and integrated plasmid. This element, able to …

The complete genome of the bacterium Erwinia tasmaniensis strain Et1/99 consisting of a
3.9 Mb circular chromosome and five plasmids was sequenced. Strain Et1/99 represents an …

The tum gene of coliphage 186, encoded on a LexA controlled operon, is essential for UV
induction of a 186 prophage. Primer extension analysis is used to confirm that Tum is the …