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Regulation of the β-Glucoside System in Escherchia coli K-12
It is suggested that the ini mutation possesses a promotor-type function that in the absence of regulatory allele function ( bglR8 ) renews the functioning of only the bglS4 and bglB + alleles, which are proposed to form a bgl operon. Expand
State of the viral DNA in rat cells transformed by polyoma virus. I. Virus rescue and the presence of nonintergrated viral DNA molecules
The interaction of polyoma virus with a continuous line of rat cells was studied, finding that these cells did not produce infectious virus, but in all clones tested virus was rescuable upon fusion with permissive mouse cells. Expand
State of the viral DNA in rat cells transformed by polyma virus. II. Identification of the cells containing nonintegrated viral DNA and the effect of viral mutations
The results suggest that the presence of free viral DNA in polyoma-transformed rat cells is caused by a spontaneous induction of viral DNA replication, occurring with low but constant probability in the transformed cell population, and that the free viralDNA molecules originate from the integrated ones, probably through a phenomenon of excision and limited replication. Expand
Regulation of the beta-glucoside system in Escherchia coli K-12.
It is suggested that the ini mutation possesses a promotor-type function that in the absence of regulatory allele function (bglR8) renews the functioning of only the bglS4 and bglB(+) alleles. Expand
Coordinate control of host DNA synthesis and measles virus production in persistently infected BHK-21 cells
- I. Prasad
- Biology, Medicine
- Archives of Virology
Results suggest that continued DNA synthesis is necessary for the expression of measles functions, and demonstrate that host function can be involved in allowing the establishment of persistent infection. Expand
Nonintegrated viral DNA in rat cells doubly transformed by SV40 and polyoma virus.
Rat F2408 cells transformed by polyoma virus contain, in addition to integrated viral genomes, a small number of nonintegrated viral DNA molecules, which can be detected in these cells in a “free” state. Expand
Simian virus 40 integration sites in the genome of virus-transformed mouse cells
The results suggest that the number of stable SV40 integration sites in the 3T3 genome is limited, since they can be saturated by transformation at high MOI, and when the MOI is low, the sites are not saturated and a subsequent infection can lead to integration. Expand
Genetic Determination of the Constitutive Biosynthesis of Phospho-β-Glucosidase A in Escherichia coli K-12
Escherichia coli wild-type cells form constitutively the enzyme phospho-β-glucosidase A, which has a high affinity for phosphorylated aromatic β-glucosides and a low affinity for phosphorylated… Expand
Characterization of measles virus recovered from persistently infected Vero cells.
Vero cells were persistently infected with measles virus in medium with antimeasles serum and, upon further propagation, reverted to the wild type suggesting that such temperature-related functions were phenotypically determined and regulated by host-cell factors. Expand