Figure 7
From: The globin gene family of the cephalochordate amphioxus: implications for chordate globin evolution
Hypothetical model for the creation of a novel globin intron from intragenic mirage duplications. A mirage repeat from the central part of the cluster is recruited to form exon E2a and be spliced to exon E2b, if a suitable splice acceptor site (black dot) is present. The novel splicing events are shown by dashed lines. The model predicts that newly generated introns contain mirage-derived repeats, which however may degenerate by mutation.