763 results found
    1. Neuroscience

    Test of the 'glymphatic' hypothesis demonstrates diffusive and aquaporin-4-independent solute transport in rodent brain parenchyma

    Alex J Smith et al.
    Solute movement in brain extracellular space is determined by solute diffusion, and does not depend on convection or aquaporin-4 expression as predicted by the glymphatic mechanism.
    1. Physics of Living Systems

    Spatial control of neuronal metabolism through glucose-mediated mitochondrial transport regulation

    Anamika Agrawal et al.
    A quantitative analysis of glucose-dependent transport regulation indicates that mitochondrial accumulation in regions of high nutrient availability can enhance metabolism in neuronal axons under physiologically relevant conditions.
    1. Developmental Biology
    2. Cell Biology

    Direct visualization of a native Wnt in vivo reveals that a long-range Wnt gradient forms by extracellular dispersal

    Ariel M Pani, Bob Goldstein
    Free, extracellular dispersal of Wnt proteins generates a long-range gradient during animal development and is required for signaling.
    1. Cell Biology
    2. Plant Biology

    A receptor-like kinase mutant with absent endodermal diffusion barrier displays selective nutrient homeostasis defects

    Alexandre Pfister et al.
    The SCHENGEN3 protein is needed for the progression of isolated microdomains into a continuous band, which is necessary for the establishment of the major extracellular diffusion barrier in plant roots: the Casparian strip.
    1. Physics of Living Systems

    Cell-sized confinement controls generation and stability of a protein wave for spatiotemporal regulation in cells

    Shunshi Kohyama et al.
    A cell-sized fully confined space significantly controls the emergence and stability of a protein wave, resulting in intracellular spatiotemporal regulation driven by a reaction-diffusion mechanism.
    1. Biochemistry and Chemical Biology

    Intracellular Diffusion: How bacteria keep proteins moving

    Conrad W Mullineaux
    Bacteria contain large numbers of negatively-charged proteins to avoid the electrostatic interactions with ribosomes that would dramatically reduce protein diffusion.
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    1. Biochemistry and Chemical Biology

    Ribosome surface properties may impose limits on the nature of the cytoplasmic proteome

    Paul E Schavemaker et al.
    The diffusion coefficients of proteins in the cytoplasm depend on their net charge and the distribution of charge over the protein surface, with positive proteins moving up to 100-fold slower because they bind to ribosomes.
    1. Physics of Living Systems

    Biophysics: Common concepts for bacterial collectives

    Hannah Jeckel et al.
    The expansion of bacterial swarms and the spreading of biofilms can be described by a unified biophysical theory that involves both active and passive processes.
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    1. Cell Biology

    Metal Transport: Pumping iron

    Caroline C Philpott
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    1. Neuroscience

    Calcium dynamics regulating the timing of decision-making in C. elegans

    Yuki Tanimoto et al.
    A series of quantitative behavioural and opto-physiological analyses using a novel robot microscope system reveals that C. elegans computes the time-differential and time-integral of sensory information for decision-making during olfactory navigation.

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