let-60 ras plays roles in the differentiation of several C. elegans tissues (Yochem, J., Sundaram, M., Han, M., 1997. Ras is required for a limited number of cell fates and not for general proliferation in Caenorhabditis elegans. Mol. Cell. Biol. 17, 2716-2722). To understand the transcriptional regulation of ras and to identify new functions for ras in development, we examined expression patterns of let-60::lacZ and let-60::GFP reporter constructs in C. elegans hermaphrodites. Fusion constructs were expressed in vulval precursor cells, sex myoblasts and in cell lineages of the somatic gonad, germline cells (GFP construct only), hypodermis, muscle and nervous system.
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