Significance of lysogeny in the marine environment: studies with isolates and a model of lysogenic
The magnitude of the lysogenic
induction was measured using the induction factor (IF), calculated as the ratio between the number of plaques of each test group and the number of plaques of the negative control group.
bacteriophage A bacteriophage is a virus that infects bacterial cells for its reproduction.
P1 replicates as a 90 kilobase (kb) plasmid in the lysogenic
state and is partitioned equally into two new daughter cells during normal cell division (2, 7, 18).
For example, the lysogenic
state of phage lambda is maintained by the cI repressor gene, which binds to control regions for the lytic cycle, shutting down those regions.
strains were grown in LB broth overnight at 37[degrees]C with shaking and diluted to an optical density at 600 nm of 0.
More strikingly, the exotoxins produced by many pathogenic bacteria are encoded in the genome of lysogenic
Isolation of Shigella sonnei lysogenic
for a bacteriophage encoding gene for production of Shiga toxin.
The genes encoding CT, ctxAB, are encoded on a lysogenic
filamentous bacteriophage, CTX[PHI] (2) and are under the direct control of the regulatory factor ToxT.
The phage remains in a lysogenic
state until environmental conditions induce expression of phage lytic cycle genes, leading to new phage production and lysis of the host bacterium.
conversion by a filamentous bacteriophage encoding cholera toxin.