-------------
- O. dioica is the first chordate where gene operons have been described. A
- 5′ splice leader (SL) bearing a trimethylated cap is found in some RNAs.
+ 40-nt 5′ [[splice leader|tags/trans-splicing]] (SL) bearing a trimethylated cap is found in some RNAs.
The SL gene is found downstream of the 5S RNA gene, which is repeated multiple
times in the genome. The 3′ acceptor site has a strong UUU(C/U/A)AG consensus
([[Ganot et al., 2004|biblio/15314184]]).