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    1. Developmental Biology
    2. Plant Biology

    Sugar promotes vegetative phase change in Arabidopsis thaliana by repressing the expression of MIR156A and MIR156C

    Li Yang et al.
    Sugar levels in leaves act as a signal for plants to switch from their juvenile to their adult form by regulating the expression of two genes.
    1. Ecology

    Acknowledging selection at sub-organismal levels resolves controversy on pro-cooperation mechanisms

    Wenying Shou
    Building on previous work (Momeni et al., 2013), it is shown that recognizing the hierarchical organization of biological systems resolves the ongoing controversy on pro-cooperation mechanisms.
    1. Evolutionary Biology

    The need for high-quality oocyte mitochondria at extreme ploidy dictates mammalian germline development

    Marco Colnaghi et al.
    Selective transfer of mitochondria in the Balbiani body ensures high-quality oocyte mitochondria at extreme ploidy, explaining many enigmatic features of female germline architecture including germ cell loss.
    1. Evolutionary Biology
    2. Genetics and Genomics

    Multi-Level Selection: The perils of cheating

    M Florencia Camus
    Experiments on mitochondrial DNA in worms highlight that cheating does not always pay off.
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    1. Computational and Systems Biology
    2. Cancer Biology

    Mitochondrial DNA copy number variation across human cancers

    Ed Reznik et al.
    Many tumors are depleted of mitochondrial DNA; this depletion is associated with changes in gene expression and with the incidence of critical somatic mutations and alterations.
    1. Stem Cells and Regenerative Medicine

    Stochastic homeostasis in human airway epithelium is achieved by neutral competition of basal cell progenitors

    Vitor H Teixeira et al.
    Cell replenishment within the airways is governed by the random division of a population of basal progenitor cells, in a process that is accelerated in smokers.
    1. Evolutionary Biology

    Adaptive evolution of nontransitive fitness in yeast

    Sean W Buskirk et al.
    A series of selective events, each improving fitness relative to an immediate predecessor, can result in organisms that are less fit compared to a distant ancestor.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Atomic structure of a mitochondrial complex I intermediate from vascular plants

    Maria Maldonado et al.
    The first atomic resolution structure of a mitochondrial respiratory complex from plants provides insight into the assembly and evolution of respiration in autotrophic eukaryotes.
    1. Cell Biology

    Elimination of paternal mitochondria in mouse embryos occurs through autophagic degradation dependent on PARKIN and MUL1

    Rebecca Rojansky et al.
    The uniparental inheritance of mammalian mitochondria results from elimination of paternal mitochondria by a mitophagic process that requires the E3 ubiquitin ligases PARKIN and MUL1.