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Plant Biology: Sugars speed up the circle of life
Sugar promotes vegetative phase change in
by repressing the expression of
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.
Acknowledging selection at sub-organismal levels resolves controversy on pro-cooperation mechanisms
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.
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.
Computational and Systems 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.
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.
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.
Biochemistry and Chemical Biology
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.
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.
Microbiology and Infectious Disease
A single clonal lineage of transmissible cancer identified in two marine mussel species in South America and Europe
Marisa A Yonemitsu et al.
A transmissible cancer that arose in a marine mussel spread from a single animal to become a global pathogen affecting two other mussel species in both Europe and South America.
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