The two largest duplicons in the C. elegans genome. (a) Genome browser image of the largest duplicons CL-2198_1 (depicted in black) and CL-2198_2 (depicted in gray), and flanking Cemar1 transposons (shown in red). (b) Alignment of the two largest duplicons indicate the locations of the small differences. From 5' to 3': (1) 319 bp deletion in first duplicon. (2) A single nucleotide insertion ('C') in first duplicon at 2,381,150 bp. (3) A single nucleotide difference ('T" is the first duplicon at 2,420,123 bp and 'C' in the second duplicon at 2,528,402 bp) (4) A single nucleotide difference ('A' in the first duplicon at 2,420,126 bp and 'T' in the second duplicon at 2,528,405 bp). (5) A single nucleotide difference ('T' in the first duplicon at 2,420,132 bp and 'C' in second duplicon at 2,528,411 bp). (6) A triplet difference ('TAC' in the first duplicon from 2,420,134 bp to 2,420,136 bp and 'ACT' in the second duplicon from 2,528,413 bp to 2,528,415 bp). (c) The 319 bp unique sequence in the largest duplicon. Multiple copies of Ce000266 repetitive element are located in the region. The upper and lower panels show the upstream and downstream copies of the largest duplicons, respectively.