Results 361 to 370 of about 4,174,904 (387)

Role of DNA in Bacterial Aggregation

Current Microbiology, 2008
The role of DNA in bacterial aggregation was determined using various types of DNA and Escherichia coli, a good model for investigating the correlation between added polymer and bacterial aggregation and adsorption of polymer to bacterial surfaces. The results of the aggregation assay suggest that extracellular DNA indeed increased the aggregation ...
Yi-Ran Yang, Xin-Cheng Shen, Zhi-Xiong Xie, Huihui Liu, Ping Shen, Zhi-Ling Zhang   +5 more
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DNA transfer in bacterial conjugation

Journal of Molecular Biology, 1966
Chromosome transfer from Hfr to F − cells was analyzed by labeling the DNA of the Hfr cells with [ 3 H]thymine prior to mating, and/or by labeling any DNA made during mating. The F − cells were either starved of adenine or heavily irradiated with ultraviolet light, with the aim of preventing them from synthesizing DNA.
Lucien G. Caro, Lucien G. Caro, Julian D. Gross, Julian D. Gross   +3 more
openaire   +2 more sources

Arrest of Bacterial DNA Replication

Annual Review of Microbiology, 1992
The chromosomes of both gram-positive and gram-negative bacteria contain sites that arrest the progression of DNA replication forks. These replication-arrest sites limit the end of the replication cycle to a particular region of the chromosome, called the terminus region.
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Chloramphenicol damages bacterial DNA

Biochemical and Biophysical Research Communications, 1977
L(+)-threo-chloramphenicol induces reversion of His−Salmonella typhimurium strains TA100 and TA1535 in the conventional Ames' assay without microsomal activation. Any mutagenicity of D(−)-threo-chloramphenicol was masked by toxicity. Similarly, a sensitive fluctuation test showed mutagenesis with L(+)-threo-chloramphenicol at concentrations of 0.5 μM ...
Karl B. Freeman, Suzanne F. Jackson, Byron Wentzell, D.R. McCalla   +3 more
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Bacterial DNA in Clarkia fossils

Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences, 1991
For the growing number of investigators who study ancient DNA, the most stimulating paper published during 1990 reported the determination of a chloroplast DNA sequence from a plant compression fossil found in a Miocene deposit at Clarkia, Idaho (Golenberg et al. 1990). During August 1990, S.P.
Arend Sidow, Allan C. Wilson, Svante Pääbo   +2 more
openaire   +3 more sources

The evolution of bacterial DNA base composition.

Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, 2014
Bacterial genomes exhibit a large amount of variation in their base composition, which ranges from 13% to 75% GC. The evolution and maintenance of this variation has proved to be an enduring puzzle despite decades of theoretical and empirical work.
Deepa Agashe, Nachiket Shankar
semanticscholar   +1 more source

Dodecylamine in the isolation of bacterial DNA

Biochimica et Biophysica Acta (BBA) - Nucleic Acids and Protein Synthesis, 1971
Abstract Lysis of enterobacteria by lysozyme and detergent was greatly accelerated by n-dodecylamine. Nicking of supercoiled DNA was not detected.
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Bacterial Dna in Mixed Cholesterol Gallstones

American Journal of Gastroenterology, 1999
Numerous investigators have proposed a role for bacteria in biliary lithogenesis. We hypothesized that bacterial DNA is present in gallstones, and that categorical differences exist between gallstone type and the frequency of bacterial sequences.Polymerase chain reaction (PCR) was used to amplify bacterial 16S rRNA and uidA (encoding Escherichia coli ...
Haigh, WG, Tarr, PI, Lee, DK, Lee, SP
openaire   +5 more sources

The Antigenicity of Bacterial DNA

2002
DNA is a complex macromolecule whose immunological properties vary with base sequence and backbone structure. Although now recognized as important for normal immunity, the antigenic and immunogenic properties of DNA were originally conceptualized entirely in the context of systemic lupus erythematosus (SLE).
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DNA motifs that sculpt the bacterial chromosome

Nature Reviews Microbiology, 2010
During the bacterial cell cycle, the processes of chromosome replication, DNA segregation, DNA repair and cell division are coordinated by precisely defined events. Tremendous progress has been made in recent years in identifying the mechanisms that underlie these processes.
Touzain, Fabrice, Petit, Marie Agnes, Schbath, Sophie, El Karoui, Meriem   +3 more
openaire   +6 more sources