title: The existence of all three ParaHox genes in the clitellate annelid, Perionyx excavatus.
abstract: A ParaHox gene cluster is composed of three genes (Gsx, Xlox, and Cdx). It has been proposed that all three ParaHox genes were present in the last common ancestor to the lophotrochozoan protostomes and the deuterostomes and that gene loss event has occurred in the ecdysozoan lineage. In this paper, we report the existence of all three ParaHox genes in Perionyx excavatus, a clitellate annelid. Although orthologs of each of the three ParaHox genes were previously discovered from other lopotrochozoan taxa, this study constitutes the first reported isolation of all three ParaHox genes in the same clitellate species.
authors.affiliation: Department of Life Science, Chung-Ang University, 221 Hukseok-Dong, Dongjak-Ku, Seoul, Republic of Korea.
authors.forename: Bum Joon
authors.initials: BJ
authors.lastname: Park
authors.forename: Sung-Jin
authors.initials: SJ
authors.lastname: Cho
authors.forename: Eun Sik
authors.initials: ES
authors.lastname: Tak
authors.forename: Bo Eun
authors.initials: BE
authors.lastname: Lee
authors.forename: Soon Cheol
authors.initials: SC
authors.lastname: Park
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D005801:Genes, Homeobox; D008969:Molecular Sequence Data; D005810:Multigene Family; D009835:Oligochaeta / Q000235:genetics*