Figure 1: Organization of N. americanus gene features compared to C. elegans.
(a) The average exon in N. americanus genes is significantly (P < 1 × 10−10) shorter and the average intron is significantly (P < 1 × 10−10) longer than in C. elegans genes. (b) Orthologous (orth.) genes have significantly (P < 1 × 10−10) more introns than nonorthologous genes in both species. (c) In orthologous genes from C. elegans, introns are longer at every intron position compared to nonorthologous genes. In a–c, error bars indicate s.e.m. (d) N. americanus genes that are in operons and conserved with C. elegans are shown on the C. elegans chromosomes.
