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    1. Chromosomes and Gene Expression

    Spen links RNA-mediated endogenous retrovirus silencing and X chromosome inactivation

    Ava C Carter et al.
    A long noncoding RNA uses viral mimicry to achieve developmental gene silencing across a chromosome.
    1. Cell Biology

    Control of brown adipose tissue adaptation to nutrient stress by the activin receptor ALK7

    Patricia Marmol et al.
    The activin receptor ALK7 regulates the adaptation of brown adipose tissue to nutrient availability by preventing over-activation of signaling pathways induced by fasting, allowing appropriate response to cold exposure.
    1. Neuroscience

    Cre-assisted fine-mapping of neural circuits using orthogonal split inteins

    Haojiang Luan et al.
    A genetic method allows neurons to be individually identified and characterized by combining information about both their developmental origins and their mature patterns of gene expression.
    1. Genetics and Genomics
    2. Neuroscience

    Sex-determining genes distinctly regulate courtship capability and target preference via sexually dimorphic neurons

    Kenichi Ishii et al.
    Sex-specific characteristics of the fruit fly courtship behavior are not specified by a single binary switch, but as a combination of traits that are modularly specified by separable genetic switches.
    1. Genetics and Genomics
    2. Neuroscience

    Layered roles of fruitless isoforms in specification and function of male aggression-promoting neurons in Drosophila

    Margot Wohl et al.
    Male-type aggressive and courtship behaviors of the fruit flies are differentially specified by two sex-determining genes, providing a substrate for the evolution to sculpt these two behaviors independently.
    1. Developmental Biology

    Antagonistic regulation by insulin-like peptide and activin ensures the elaboration of appropriate dendritic field sizes of amacrine neurons

    Jiangnan Luo et al.
    Afferent-derived factors control the elaboration of appropriate and robust sizes of dendritic arbors by dynamically modulating dendritic growth parameters.
    1. Neuroscience

    PARIS, an optogenetic method for functionally mapping gap junctions

    Ling Wu et al.
    As the first fully genetically encoded method, PARIS allows cell-specific, long-term, repeated measurements of gap junctional coupling with high spatiotemporal resolution, facilitating its study in both health and disease.
    1. Biochemistry and Chemical Biology

    GPIHBP1 expression in gliomas promotes utilization of lipoprotein-derived nutrients

    Xuchen Hu et al.
    The expression of the lipoprotein lipase (LPL) transporter GPIHBP1 in glioma capillaries promotes the LPL-mediated processing of triglyceride-rich lipoproteins, thereby providing lipid nutrients for glioma cells.
    1. Biochemistry and Chemical Biology

    An explanation for origin unwinding in eukaryotes

    Lance D Langston, Michael E O'Donnell
    CMG helicase translocates with force while encircling duplex DNA, enabling two opposing CMG complexes at an origin to melt the duplex and switch to encircling separate single strands.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Synergy between RecBCD subunits is essential for efficient DNA unwinding

    Rani Zananiri et al.
    A new optical tweezers assay sheds light on the mechanism of cooperation and force generation by the subunits of RecBCD, critical for the repair of double strand breaks in bacteria.