An unusual operon

The operon CEOP3188 contains the gene R07E5.10.

R07E5.10 has two isoforms R07E5.10b and R07E5.10a. These might be better represented as two individual genes.

They each start with a SL1/SL2 trans-splicing site. The SL1/SL2 site for R07E5.10a is at the start of the last intron of the upstream R07E5.10b, so the 5’ UTR of R07E5.10a overlaps with the last exon of R07E5.10b.

There is a very strong PolyA site at the end of the first intron of R07E5.10a.