Results 101 to 110 of about 34,321,194 (310)

Coda Wave Attenuation Characteristics for North Anatolian Fault Zone, Turkey

open access: yesOpen Geosciences, 2017
North Anatolian Fault Zone, on which large earthquakes have occurred in the past, migrates regularly from east to west, and it is one of the most active faults in the world.
Sertcelik Fadime, Guleroglu Mehmet
doaj   +1 more source

In vivo imaging of cell behaviors and F-actin reveals LIM-HD transcription factor regulation of peripheral versus central sensory axon development

open access: yesNeural Development, 2011
Background Development of specific neuronal morphology requires precise control over cell motility processes, including axon formation, outgrowth and branching.
Andersen Erica F   +2 more
doaj   +1 more source

Specific DNA Recognition by F Factor TraY Involves β-Sheet Residues*

open access: yesJournal of Biological Chemistry, 1999
The F Factor TraY protein is a sequence-specific DNA-binding protein required for efficient conjugal transfer. Genetic and biochemical studies indicate that TraY has two functional roles in conjugation.
Pamela L. Lum, J. Schildbach
semanticscholar   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

open access: yesFEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

open access: yesFEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin   +2 more
wiley   +1 more source

f-Optimal factors of infinite graphs

open access: yesDiscrete Mathematics, 1991
Given an infinite graph \(G=(V,E)\) and a function \(f\) from \(V\) into the set of natural numbers, a perfect \(f\)-factor is a subgraph \(H=(V,F)\) with \(F\subseteq E\) such that \(\deg_ H(v)=f(v)\) for each vertex \(v\in V\). A necessary and sufficient condition for the existence of perfect \(f\)- factors of countable graphs is proved.
openaire   +2 more sources

Attachment of wild-type F factor to a specific chromosomal region in a variant strain of Escherichia coli K12: the phenomenon of episomic alternation

open access: yes, 1961
A variant strain of Escherichia coli K12 (♂ 3 ) was obtained after ultra-violet irradiation. This strain differs from wild type in the possession of a preferred chromosomal site for the F factor. When wild-type females are infected with the F factor they
A. Richter
semanticscholar   +1 more source

Energetics of the Sequence-specific Binding of Single-stranded DNA by the F Factor Relaxase Domain*

open access: yesJournal of Biological Chemistry, 2004
Transfer of conjugative plasmids between bacteria requires the activity of relaxases or mobilization proteins. These proteins nick the plasmid in a site- and strand-specific manner prior to transfer of the cut strand from donor to recipient.
Jennifer C. Stern   +3 more
semanticscholar   +1 more source

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

open access: yesFEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi   +5 more
wiley   +1 more source

A cyanobacterial sigma factor F controls biofilm-promoting genes through intra- and intercellular pathways

open access: yesBiofilm
Cyanobacteria frequently constitute integral components of microbial communities known as phototrophic biofilms, which are widespread in various environments.
Shiran Suban   +8 more
doaj   +1 more source

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