Figure 6.

Exon–intron structure analysis of RLRs with diverse N-terminal domains in lophotrochozoans. The exon–intron structures (left) and the schematic diagrams of the domain composition (right) of the RLRs with non-canonical N-terminal domains of nine groups of homologous genes. The blue rectangle represents the exon, and the solid line represents the uncoded sequence in the alignment. The number marks the length of the exon or unencoded sequence. White bars in exons depict the indels that have resulted from insertion/deletion events.