Evidence for Transitional Stages in the Evolution of Euglenid Group II Introns and Twintrons in the Monomorphina aenigmatica Plastid Genome
Figure 2
Euglena gracilis twintron insertion sites found in M. aenigmatica.
Internal introns not found in M. aenigmatica are indicated by dashed lines. The total length of each insertion site is indicated on the right. Group II (GII) and group III (GIII) introns are indicated below the corresponding introns. Maen, Monomorphina aenigmatica; Egra, Euglena gracilis. The number after the period corresponds to the insertion site on the gene. In psbC.Egra.2, the fragmented ORF spliced together after excision of the internal introns is marked by asterisks.