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Most biological phenomena, including behavior and metabolic pathways, are governed by an internal clock system that is circadian (i.e., with a period of approximately 24 h) and is reset by light exposure from outside. In order to understand the molecular basis of the resetting mechanism of the clock, we attempted to isolate light-inducible transcripts in the suprachiasmatic nucleus, where the master...
We identified the Dexamethasone-induced RAS protein 1 (Dexras1) gene as a cycling gene in the suprachiasmatic nucleus (SCN). Investigation of the whole brain using in situ hybridization demonstrated the localization of the expression of the gene in the SCN, thalamus, piriform cortex and hippocampus. However, rhythmic expression of the gene was observed only in the SCN. The rhythmic change in gene...
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