Search Results - "Bergthorsson, U"

Distribution of chromosome length variation in natural isolates of Escherichia coli by Bergthorsson, U, Ochman, H

“…Large-scale variation in chromosome size was analyzed in 35 natural isolates of Escherichia coli by physical mapping with a restriction enzyme whose sites are…”
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Gene conversion and DNA sequence polymorphism in the sex-determination gene fog-2 and its paralog ftr-1 in Caenorhabditis elegans by Rane, Hallie S, Smith, Jessica M, Bergthorsson, Ulfar, Katju, Vaishali

“…Gene conversion, a form of concerted evolution, bears enormous potential to shape the trajectory of sequence and functional divergence of gene paralogs…”
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Heterogeneity of genome sizes among natural isolates of Escherichia coli by Bergthorsson, U, Ochman, H

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Effect of chromosome location on bacterial mutation rates by Hudson, Richard Ellis, Bergthorsson, Ulfar, Roth, John R, Ochman, Howard

“…In previous comparisons of enterobacterial sequences, synonymous substitution rates were higher in genes closer to the replication terminus, suggesting that…”
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Widespread horizontal transfer of mitochondrial genes in flowering plants by Palmer, Jeffrey D, Bergthorsson, Ulfar, Adams, Keith L, Thomason, Brendan

“…Horizontal gene transfer-the exchange of genes across mating barriers-is recognized as a major force in bacterial evolution. However, in eukaryotes it is…”
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Massive horizontal transfer of mitochondrial genes from diverse land plant donors to the basal angiosperm Amborella by Bergthorsson, U, Richardson, A.O, Young, G.J, Goertzen, L.R, Palmer, J.D

“…Several plants are known to have acquired a single mitochondrial gene by horizontal gene transfer (HGT), but whether these or any other plants have acquired…”
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Amplification-Mutagenesis: Evidence That "Directed" Adaptive Mutation and General Hypermutability Result from Growth with a Selected Gene Amplification by Hendrickson, Heather, Slechta, E. Susan, Bergthorsson, Ulfar, Andersson, Dan I., Roth, John R.

“…When a particular lac mutant of Escherichia coli starves in the presence of lactose, nongrowing cells appear to direct mutations preferentially to sites that…”
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Regulation of NAD Synthesis by the Trifunctional NadR Protein of Salmonella enterica by GROSE, Julianne H, BERGTHORSSON, Ulfar, ROTH, John R

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Transcription increases multiple spontaneous point mutations in Salmonella enterica by Hudson, Richard Ellis, Bergthorsson, Ulfar, Ochman, Howard

“…The spontaneous rate of G·C→A·T mutations and a hotspot T·A→G·C transversion are known to increase with the frequency of transcription—increases that have been…”
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Assimilation of Nicotinamide Mononucleotide Requires Periplasmic AphA Phosphatase in Salmonella enterica by GROSE, Julianne H, BERGTHORSSON, Ulfar, YAPING XU, STERNECKERT, Jared, KHODAVERDIAN, Behzad, ROTH, John R

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Natural Isolates of Salmonella enterica Serovar Dublin Carry a Single nadA Missense Mutation by BERGTHORSSON, Ulfar, ROTH, John R

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Formation of an F' plasmid by recombination between imperfectly repeated chromosomal Rep sequences: a closer look at an old friend (F'(128) pro lac) by Kofoid, Eric, Bergthorsson, Ulfar, Slechta, E Susan, Roth, John R

“…Plasmid F'(128) was formed by an exchange between chromosomal Rep sequences that placed lac near dinB between many pairs of Rep sequences. Plasmid F'(128) is…”
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Rates and patterns of chromosome evolution in enteric bacteria by Ochman, Howard, Bergthorsson, Ulfar

“…Although several types of large-scale alterations potentially affect the structure and organization of bacterial genomes, recent analyses of physical maps and…”
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Chromosomal Changes during Experimental Evolution in Laboratory Populations of Escherichia coli by Bergthorsson, U, Ochman, H

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Genome evolution in enteric bacteria by Ochman, Howard, Bergthorsson, Ulfar

“…For more than a decade, the study of bacterial evolution has been dominated by the comparative analysis of nucleotide sequences within and among species. This…”
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