Biologists at the University of California, San Diego have identified a new component of the cellular mechanism by which humans and animals automatically check the quality of their nerve cells to assure they're working properly during development. In a paper published in this week's issue of the journal Neuron, the scientists report the discovery in the laboratory roundworm C. elegans of a "quality check" system for neurons that uses two proteins to squelch the signals from defective neurons and marks them for either repair or destruction...
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