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Histone variants play important roles in eukaryotic genome organization, the control of gene expression, cell division and DNA repair. Unlike other organisms that employ several H2A variants for different functions, the parsimonious fruit fly Drosophila melanogaster gets along with just a single H2A variant, H2A.V. Remarkably, H2A.V unites within one molecule features and functions of two different...
Bacteria lack many of the features that eukaryotic cells use to compartmentalize cytoplasm and membranes. In this issue, Schlimpert et al. describe a new mechanism of spatial confinment in the bacterium Caulobacter crescentus that prevents the exchange of soluble and membrane proteins between the stalk and cell body.
In this experimental work both qualitative (flow visualisation) and quantitative (laser Doppler anemometry) methods were applied in a wind tunnel in order to describe the complex three-dimensional flow field in a real environment (a street canyon intersection). The main aim was an examination of the mean flow, turbulence and flow pathlines characterising a complex three-dimensional urban location...
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