Evolution of the Alx Homeobox Gene Family
Author Information
Author(s): Imelda M. McGonnell, Anthony Graham, Joanna Richardson, Jennifer L. Fish, Michael J. Depew, Chris T. Dee, Peter W.H. Holland, Tokiharu Takahashi
Primary Institution: The Royal Veterinary College
Hypothesis
How has the Alx homeobox gene family evolved in vertebrates?
Conclusion
The Alx3 gene has been independently lost in several vertebrate lineages, while Alx1 and Alx4 have been consistently retained.
Supporting Evidence
- The Alx gene family is crucial for craniofacial development.
- Alx3 gene loss has occurred independently in multiple vertebrate lineages.
- Gene expression patterns suggest redundancy among Alx genes.
Takeaway
Some genes that help form faces in animals have been lost in some species but not in others, showing how genes can change over time.
Methodology
Phylogenetic and comparative genomic analyses were used to study the Alx gene family across different vertebrate species.
Limitations
The study primarily focuses on specific vertebrate lineages and may not encompass all species.
Digital Object Identifier (DOI)
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