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The discovery that microRNAs (miRNAs) play important roles in regulating gene expression via posttranscriptional repression has revealed a previously unsuspected mechanism controlling development and progenitor-cell function (reviewed in (1, 2) ); however, little is known of miRNA functions in...
In insect and vertebrate eyes, different types of color-detecting photoreceptors are randomly distributed throughout the retina. A recent study has provided important new insights into the developmental mechanisms that generate the retinal mosaic required for color vision.
Background Myc is a well-known proto-oncogene, but its functions in normal tissue remain enigmatic. In adult epidermis, Myc stimulates exit from the stem cell compartment, decreasing cell adhesion and, by an unknown mechanism, triggering proliferation of transit-amplifying cells.
In Drosophila , about 50 classes of olfactory receptor neurons enter the brain where their axons form highly specific synapses with the dendrites of identified partner neurons. A recent study has shown that genetic manipulations that shift the position of one class of postsynaptic dendrites can...
Background The TOR (target of rapamycin) ser/thr protein kinase is the central component of a eukaryotic signaling pathway that regulates growth and is the direct target of the clinically useful drug rapamycin. Recent efforts have identified at least two multiprotein complexes that contain TOR,...
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