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+[[!meta title="On the origin and evolution of vertebrate olfactory receptor genes: comparative genome analysis among 23 chordate species."]]
+[[!tag Oikopleura olfaction]]
+
+Niimura Y.
+
+Genome Biol Evol. 2009 Apr 30;1:34-44. doi:10.1093/gbe/evp003
+
+On the origin and evolution of vertebrate olfactory receptor genes: comparative genome analysis among 23 chordate species.
+
+[[!pmid 20333175 desc="No ORs found in Oikopleura or Ciona"]]
- Some muscle genes were duplicated in the _Oikopleura_ stem lineage
([[Inoue & Satoh|biblio/29319812]]), prehaps reflecting the importance of
tail movements at larval and adult stages.
-
+ - No olfactory receptors have been found in _Oikopleura_ nor in _Ciona_
+ ([[Niimura, 2009|biblio/20333175]]).
Transcriptome
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