Additional file 10.
Table presenting the summary of evolutionary properties of chemoreceptor genes from Caenorhabditis elegans, C. briggsae, and C. remanei. Metabotropic neurotransmitter and FRMF-amide receptor related genes are also shown for comparison. Fraction strict orthologs is the fraction of C. elegans genes with single orthologs in both C. briggsae and C. remanei, as determined the protein tree. Fraction clustered in the genome is the fraction of C. elegans genes that have another family member located within five genes in the genome. Tree gene number indicates the number of genes used for protein tree analysis (see Methods for specifics). For the C. elegans tree gene number column, the number in parentheses is the number of genes predicted to encode functional receptors in the reference N2 genome. Naively, we expect that a similar fraction of genes from the other two species will be functional in their respective reference genomes. For example, in the srh family there will be (218/294) × 214 functional genes in C. remanei and (218/294) × 165 functional genes in C. briggsae.
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Thomas and Robertson BMC Biology 2008 6:42 doi:10.1186/1741-7007-6-42