Nucleic Acids Res. 2006 Jul 5;34(11):3378-88 doi:10.1093/nar/gkl418

Satou Y, Hamaguchi M, Takeuchi K, Hastings KE, Satoh N.

Genomic overview of mRNA 5'-leader trans-splicing in the ascidian Ciona intestinalis.

Analysis of oligo-capped cDNAs reports a single splice leader (16 nt-long) in 27% of the cDNAs.