Loss of the Olfactory GC-D Gene in Primates
Author Information
Author(s): Janet M. Young, Hang Waters, Cora Dong, Hans-Jürgen Fülle, Emily R. Liman
Primary Institution: Fred Hutchinson Cancer Research Center
Hypothesis
When during primate evolution was the functional GC-D gene lost?
Conclusion
The GC-D gene became a pseudogene in most primate species over 40 million years ago, indicating a loss of chemosensory function.
Supporting Evidence
- GC-D is a pseudogene in many primate species, including humans and apes.
- The gene is intact in species like mouse and rat, indicating functional differences.
- Loss of GC-D function likely occurred over 40 million years ago.
Takeaway
Most primates can't use a specific gene for smelling because it stopped working a long time ago, which means they might not smell things the same way other animals do.
Methodology
The study used bioinformatic analysis and PCR sequencing of genomic DNA from various primate species to assess the status of the GC-D gene.
Limitations
The study relies on genomic data that may not be complete for all species examined.
Digital Object Identifier (DOI)
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