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Biol Direct
2011 Oct 17;6:54. doi: 10.1186/1745-6150-6-54.
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Phylogenetic analysis reveals wide distribution of globin X.
Dröge J
,
Makałowski W
.
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The vertebrate globin gene repertoire consists of seven members that differ in terms of structure, function and phyletic distribution. While hemoglobin, myoglobin, cytoglobin, and neuroglobin are present in almost all gnathostomes examined so far, other globin genes, like globin X, are much more restricted in their phyletic distribution. Till today, globin X has only been found in teleost fish and Xenopus. Here, we report that globin X is also present in the genomes of the sea lamprey, ghost shark and reptiles. Moreover, the identification of orthologs of globin X in crustacean, insects, platyhelminthes, and hemichordates confirms its ancient origin.
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