9,885 results found
    1. Structural Biology and Molecular Biophysics
    2. Chromosomes and Gene Expression

    Selection of chromosomal DNA libraries using a multiplex CRISPR system

    Owen W Ryan et al.
    An optimized CRISPR-Cas9 system enables multiplexed genome engineering for evolving biomolecules and pathways from chromosomally integrated DNA libraries.
    1. Structural Biology and Molecular Biophysics

    High-resolution and high-accuracy topographic and transcriptional maps of the nucleosome barrier

    Zhijie Chen et al.
    Direct observation of RNA Polymerase II transcription through a single nucleosome at near basepair resolution suggests a mechanism for selective control of gene expression.
    1. Biochemistry and Chemical Biology
    2. Evolutionary Biology

    Reverse evolution leads to genotypic incompatibility despite functional and active site convergence

    Miriam Kaltenbach et al.
    Enzyme evolution is reversible on a structural and functional (phenotypic) level, but through a different mutational pathway that leads to genotypic incompatibility with the ancestor.
    1. Biochemistry and Chemical Biology
    2. Neuroscience

    Organic electrochemical transistor arrays for real-time mapping of evoked neurotransmitter release in vivo

    Kai Xie et al.
    An implantable device based on organic electrochemical transistors is developed for quantitative mapping of neurotransmitter release across multiple brain regions, revealing a cross-talk between the mesolimbic and nigrostriatal dopaminergic pathways.
    1. Neuroscience

    Chronic 2P-STED imaging reveals high turnover of dendritic spines in the hippocampus in vivo

    Thomas Pfeiffer et al.
    Super-resolution STED microscopy is demonstrated for the first time in the deeply embedded mouse hippocampus in vivo, revealing direct evidence for an unprecedentedly high level of synapse remodeling in a brain structure closely associated with memory processing.
    1. Genetics and Genomics

    Repeated losses of PRDM9-directed recombination despite the conservation of PRDM9 across vertebrates

    Zachary Baker et al.
    PRDM9 is widely conserved across vertebrates yet has been lost numerous times, as has its role in directing meiotic recombination.
    1. Biochemistry and Chemical Biology

    Extensive site-directed mutagenesis reveals interconnected functional units in the alkaline phosphatase active site

    Fanny Sunden et al.
    Conventional studies have focused on enzymatic residues directly involved in catalysis; dissecting a potential interaction network within which these ‘catalytic residues’ are embedded provides insights fundamental to enzyme function, evolution, and engineering.
    1. Evolutionary Biology

    Constitutive activation of cellular immunity underlies the evolution of resistance to infection in Drosophila

    Alexandre B Leitão et al.
    Single-cell transcriptomics of immune cells demonstrates that populations evolve inducible defences when infection rates are low and constitutive defences when infection is common.
    1. Chromosomes and Gene Expression
    2. Computational and Systems Biology

    Computational prediction of CTCF/cohesin-based intra-TAD loops that insulate chromatin contacts and gene expression in mouse liver

    Bryan J Matthews, David J Waxman
    Certain types of 3D chromatin loops are easy to predict from existing or easily obtainable 2D information, which benefits gene expression studies in tissues/cells/organisms without extensive pre-existing 3D information.
    1. Computational and Systems Biology
    2. Ecology

    TRex, a fast multi-animal tracking system with markerless identification, and 2D estimation of posture and visual fields

    Tristan Walter, Iain D Couzin
    Being fast, memory efficient, easy to use, and with powerful integrated tools, TRex will lower barriers of entry into, and enable more ambitious approaches to, the quantitative study of behavior.

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