- Defensome genes such as dehydrogenases and (Glutamate-cysteine ligase modifier subunit; Gclm)
are activated by polyunsaturated aldehydes produced by diatoms
([[Torres-Águila and coll., 2018|biblio/30272001]]).
+ - The _Hox_ cluster has been split up in Oikopleura ([[Seo and coll., 2004|biblio/15343333]]).
- _O. dioica_ has 83 homeobox genes, according to [[Edvardsen and coll., 2005|biblio/15649342]].
Illustrating how diverged are the sequences, earlier attempts to clone Hox genes yielded
only a single clone ([[Holland and coll. 1994|biblio/7579513]]).