Biological rhythms with periods of less than a day are physiologically important but poorly understood. In this issue of Cell, Norman, Maricq, and colleagues (Norman et al., 2005) show that VAV-1, a guanine nucleotide exchange factor for Rho-family GTPases, is necessary for three rhythmic behaviors in the nematode Caenorhabditis elegans: feeding, defecation, and ovulation.
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| http://dx.doi.org/10.1016/j.cell.2005.09.018 | DOI Listing |
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