Hugh M. Robertson

The Large srh Family of Chemoreceptor Genes in Caenorhabditis Nematodes Reveals Processes of Genome Evolution Involving Large Duplications and Deletions and Intron Gains and Losses

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Figure 4.

Reconstruction of the ancestral intron placements for the srhfamily of chemoreceptor genes. Exons are shown as open numbered boxes of roughly accurate length, whereas introns are shown as lettered lines. Phases of the introns are shown above them. (0) Between codons; (1) between the first and second bases of a codon; (2) between the second and third bases of a codon. Arrowheads indicate the positions of insertion of new introns f–l.