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    1. Evolutionary Biology
    2. Physics of Living Systems

    Evolution of irreversible somatic differentiation

    Yuanxiao Gao et al.
    Irreversible differentiation into somatic cells is evolutionarily optimal if changing cell phenotype is costly, a few somatic cells already improve the organism's performance, and the organism is large enough.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    An improved fluorescent noncanonical amino acid for measuring conformational distributions using time-resolved transition metal ion FRET

    William N Zagotta et al.
    Time-resolved transition metal ion fluorescence resonance energy transfer using a fluorescent, noncanonical amino acid donor and metal ion acceptor measures distances and distance distributions in proteins, allowing the equilibrium distributions among conformational states to be accurately determined.
    1. Ecology

    Linking spatial self-organization to community assembly and biodiversity

    Bidesh K Bera et al.
    A trait-based model of dryland vegetation uncovers the roles of spatial self-organization in maintaining biodiversity in a changing climate and offers novel ways of managing ecosystems at risk.
    1. Developmental Biology
    2. Neuroscience

    Activity-dependent modulation of synapse-regulating genes in astrocytes

    Isabella Farhy-Tselnicker et al.
    RNA sequencing and genetic mouse models reveal that transcriptional changes to astrocytes in the developing cortex are not intrinsic but influenced by their environment and determine that expression of astrocyte synapse-regulating genes and neuronal synaptogenesis is modulated by ongoing astrocyte-neuron communication.
    1. Evolutionary Biology
    2. Genetics and Genomics

    A modified fluctuation assay reveals a natural mutator phenotype that drives mutation spectrum variation within Saccharomyces cerevisiae

    Pengyao Jiang et al.
    Certain mutational signatures vary in their contribution to genetic variation across the yeast phylogeny due to genetically encoded natural mutator phenotypes whose activity can be directly measured in the lab.
    1. Microbiology and Infectious Disease
    2. Physics of Living Systems

    Inhibition of SARS-CoV-2 polymerase by nucleotide analogs from a single-molecule perspective

    Mona Seifert et al.
    High-throughput and ultra-stable magnetic tweezers reveal that Remdesivir induces a long-lived backtrack pause upon incorporation by the coronavirus polymerase, and SARS-CoV-2 is able to evade interferon-induced antiviral ddhCTP.
    1. Epidemiology and Global Health
    2. Microbiology and Infectious Disease

    Multiple introductions of multidrug-resistant typhoid associated with acute infection and asymptomatic carriage, Kenya

    Samuel Kariuki et al.
    Carriage of MDR S. Typhi H58 sublineages that also cause acute disease provides understanding of the transmission dynamics of typhoid fever and maintenance of local pathogen populations in Kenya children.
    1. Developmental Biology

    End-of-life targeted degradation of DAF-2 insulin/IGF-1 receptor promotes longevity free from growth-related pathologies

    Richard Venz et al.
    Inducible degradation of the insulin/insulin-like growth factor-1 receptor shows that a doubling in lifespan is possible even at extremely old ages in an organism.
    1. Computational and Systems Biology
    2. Genetics and Genomics

    Information content differentiates enhancers from silencers in mouse photoreceptors

    Ryan Z Friedman et al.
    Silencers and enhancers targeted by a common transcription factor in photoreceptors are distinguished by the number and diversity of binding transcription factor binding sites they contain.
    1. Developmental Biology

    Cell-to-cell heterogeneity in Sox2 and Bra expression guides progenitor motility and destiny

    Michèle Romanos et al.
    Spatial variations of transcription factor expression regulate the choice of progenitors to stay in their niche or to migrate into neural and mesodermal tissues.