[[Albalat, Martí-Solans and Cañestro, 2012|biblio/22389042]]).
It has Dnmt2, but this is a tRNA methyltransferase and it was later renamed Trdmt1 accordingly.
[[Jurkowski and Jeltsch (2011)|bilbio/22140515]] did not find Dnmt2 in O. dioica.
+ - _O. dioica_ lost CDCA7, HELLS, UHRF1 and other genes related to DNA methylation
+ ([[Funabiki and coll., 2023|biblio/10.1101_2023.01.30.526367v1]]).
- CYP1 family genes and their regulator AhR are not detectable
([[Yadetie et al, 2012|biblio/22300585]]).
- No olfactory receptors have been found in _Oikopleura_ nor in _Ciona_