Discovery notes
Phylogenetic analysis reveals wide distribution of globin X
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* Corresponding author: Wojciech Makałowski wojmak@uni-muenster.de
Institute of Bioinformatics, Faculty of Medicine, University of Muenster, Niels Stensen Str. 14, 48149 Muenster, Germany
Biology Direct 2011, 6:54 doi:10.1186/1745-6150-6-54
Published: 17 October 2011Abstract
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.