Figure 6.
Four types of intragenic splicing: co-linear cis-splicing (Case 1), non-co-linear cis-splicing (i.e. circular RNAs; Case 2), co-linear trans-splicing (i.e. the formation of trans-spliced RNAs from different alleles or opposite strands of the same gene; Case 3) and non-co-linear trans-splicing (i.e. the formation of trans-spliced RNAs from the same gene by exon rearrangement; Case 4).