Only 8% of the 18,967 genes in the
Gene profiles in developing worms
Only 8% of the 18,967 genes in the Caenorhabditis elegans genome have been extensively studied using biochemistry or genetics. In the January 2 Proceedings of the National Academy of Sciences, Jiang et al. constructed microarrays with nearly every C. elegans gene to profile expression throughout development (Proc Natl Acad Sci USA 2001, 98:218-223). They compared gene expression in six developmental stages from eggs to adult worms. Around two thirds of genes were found to vary during developm

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