Fig. 4From: Rapid protein evolution, organellar reductions, and invasive intronic elements in the marine aerobic parasite dinoflagellate Amoebophrya sppPredicted hairpin secondary structure of introners and their putative splicing mechanism. a Schematic representation of the splicing mechanism displaying the set of spliceosome proteins identified by sequence homology in the A25 and A120 proteomes. A missing U1 protein in both genomes is indicated by a gray area containing a question mark. * corresponds to U5 identified in A120 only. b A schematic structure of an introner containing direct repeat (DR) and inverted repeat (IR) motifs in the Amoebophrya genome (DNA). c Predicted secondary structure (RNA) of an introner defined by RNAfoldBack to article page